A strong outboard battery combines starting power suited to the engine with enough reserve for onboard electronics, making dual-purpose marine models a good fit for many boaters. This roundup compares nine options, including lithium batteries rated from 100Ah to 165Ah, a 92Ah AGM model, and a dedicated electric-outboard battery. The leading pick, LiTime 12V 165Ah Battery, pairs a stated 1200 CCA rating with 165Ah capacity and a dual-purpose design, but its compatibility exclusions matter.
Several other options specify 900 CCA, while the Redodo 165Ah model lists compatibility limits for particular engines. Before choosing, check the engine maker’s battery requirements, charging system, physical fit, and whether you need a single battery, a two-pack, or power for an electric outboard.
LiTime 12V 165Ah Battery is the strongest all-around match because it combines 1200 CCA starting power, 165Ah capacity, and a dual-purpose design for cranking and marine electronics. Its listing identifies compatibility with most Honda, Suzuki, Evinrude, and Tohatsu outboards, but excludes Yamaha and Mercury, so verify your exact engine before buying. Choose a lower-capacity option if it better fits your boat or requirements; choose the dedicated electric-outboard model for propulsion loads rather than fuel-engine starting.
Our Top Picks
Best OverallIts 165Ah capacity and stated 1200 CCA support starting and electronics; the listing names several compatible brands but excludes Yamaha and Mercury.
View on Amazon
Highest CapacityThe 165Ah model lists 1200 CCA and 2112Wh, with stated support for Honda, Suzuki, and most Mercury models except Optimax.
View on Amazon
Bluetooth MonitoringThis Group 27 lithium model lists 900 CCA, 1000 MCA, Bluetooth monitoring, and self-heating for charging at -4°F.
View on Amazon- AGM Alternative MARXON Group 27M Battery
- Electric Outboard LiTime 12V 100Ah OBM Battery
Compare the Outboard Battery Options
| # | Product | Dimensions | Weight | Battery Capacity | Voltage | Buy |
|---|---|---|---|---|---|---|
| 1 | 1. LiTime 12V 165Ah BatteryBest Overall | 20.98 x 8.19 x 8.5 in | 33.5 lb | 165 amp hours | 12.8 V | View on Amazon |
| 2 | 2. Redodo 12V 165Ah BatteryHighest Capacity | 6.77"D x 13"W x 8.5"H | 33.5 lb | — | 12.8 V | View on Amazon |
| 3 | 3. Redodo 12V 100Ah BatteryBluetooth Monitoring | 6.69 x 12.13 x 8.31 in | 23.1 lb | — | 12.8 V | View on Amazon |
| 4 |  4. Redodo 100Ah Two-PackBluetooth-Monitoring Marine Starter | 6.69"D x 12.13"W x 8.31"H | 23.1 lb | — | 12.8 V | View on Amazon |
| 5 |  5. LiTime 12V 100Ah BatteryGroup 24 Lithium Dual-Purpose Fit | 7.76"D x 5.2"W x 6.69"H | 22.7 lb | 100 amp hours | 12.8 V | View on Amazon |
| 6 |  6. Power Queen 12V 100Ah BatteryFishing-Day Reserve Power | 7.79 x 6.53 x 6.69 in | 11.6 lb | 100 amp hours | 12.8 V | View on Amazon |
| 7 |  7. LiTime 12V 165Ah Two-PackHigh-Capacity Mixed-Load Boaters | 13.11 x 6.93 x 9.45 in | 15.19 kg | 165 amp hours | 12.8 V | View on Amazon |
| 8 |  8. MARXON Group 27M BatteryAGM Alternative | — | — | — | — | View on Amazon |
| 9 |  9. LiTime 12V 100Ah OBM BatteryElectric Outboard | 13.11 x 6.77 x 8.5 in | 10.24 kg | 100 amp hours | 12 V | View on Amazon |
Detailed Reviews: Best Battery For Outboard Motor 2
#1 · Best Overall
1. LiTime 12V 165Ah Battery
- Dimensions: 20.98 x 8.19 x 8.5 in
- Weight: 33.5 lb
- Battery Capacity: 165 amp hours
- Voltage: 12.8 V
Best for: High-Capacity Fuel-Outboard Starter.
Why it ranks #1: Its 165Ah capacity and stated 1200 CCA support starting and electronics; the listing names several compatible brands but excludes Yamaha and Mercury.
With 165Ah capacity and 1200 CCA, this LiTime battery can handle outboard cranking while supplying marine devices such as fish finders and trolling motors. Its dual-purpose format can consolidate starting and electronics power in one unit, making onboard battery-space planning simpler for compatible boats.
LiTime names Honda, Suzuki, Evinrude and Tohatsu among compatible outboards and specifies ABYC E-13-compliant installation, giving owners concrete compatibility and installation points to check. Bluetooth and self-heating are listed, with a charging range of -4°F to 122°F. The battery weighs 33.5 pounds and measures 20.98 x 8.19 x 8.5 inches according to its specifications, so confirm available space and handling arrangements before installation.
- 165Ah dual-purpose capacity
- 1200 CCA starting power
- Bluetooth and self-heating listed
- ABYC E-13-compliant installation specified
- Not recommended for Yamaha or Mercury outboards.
Skip it if you own a Yamaha or Mercury outboard; Redodo’s 12V 165Ah Dual Purpose Lithium Marine Battery lists Mercury compatibility except Optimax.
This fits compatible fuel-outboard owners who want 165Ah for starting and onboard electronics in one battery. Its listed Yamaha and Mercury exclusions and substantial dimensions should guide the final engine and space checks.
Full product details
| Brand | Litime |
|---|---|
| Battery Capacity | 165 amp_hours |
| Battery Weight | 33.5 pounds |
| Compatible Phone Models | Outboard Motor, Marine, Trolling Motor, Boat |
| Included Components | 1*12V 165Ah Marine Battery |
| Item Dimensions | 20.98 x 8.19 x 8.5 inches |
| Item Weight | 33.5 pounds |
| Manufacturer | Litime |
| Model | L12V165-150-DP-BT-CCA1K2-4-A100 |
| Model Number | DA-A2111EB-0D |
| Recommended Uses | Not for Yamaha, Mercury outboard motors; Ideal for Outboard Motor, Marine, Trolling Motor, Boat |
| Voltage | 12.8 volts |
| Warranty Description | 5 Years Warranty |
Listed on Amazon as: LiTime 12V 165Ah Dual Purpose Cranking Starting LiFePO4 Battery for Boat
View on Amazon#2 · Highest Capacity
2. Redodo 12V 165Ah Battery
- Dimensions: 6.77"D x 13"W x 8.5"H
- Weight: 33.5 lb
- Voltage: 12.8 V
Best for: High-Capacity 165Ah Marine Loads.
Why it ranks #2: The 165Ah model lists 1200 CCA and 2112Wh, with stated support for Honda, Suzuki, and most Mercury models except Optimax.
The Redodo 165Ah battery lists 1200 CCA and 2112Wh of deep-cycle energy, combining fuel-outboard starting with substantial power for marine electronics. Its Group 31 size and dual-purpose design target boaters looking to cover starting and accessory loads with one battery rather than a separate pair.
Redodo lists compatibility with Mercury except Optimax, Suzuki and Honda, while excluding outboards without voltage regulators, including Evinrude, Johnson and Mercury Black Max. That specific engine guidance matters before purchase. The 12.8V unit measures 13 x 6.77 x 8.5 inches and weighs 33.5 pounds, so buyers can assess installation space and handling. The listed 2112Wh supports electronics loads, and 1200 CCA addresses fuel-outboard starting.
- 165Ah capacity and 2112Wh deep-cycle energy
- 1200 CCA starting power
- Group 31 dimensions and weight specified
- Compatibility guidance names supported and excluded outboards
- Not compatible with Evinrude, Johnson, or Mercury Black Max outboards.
Skip it if you run an Evinrude, Johnson, or Mercury Black Max; LiTime’s 12V 165Ah Dual Purpose Cranking Battery lists Evinrude compatibility.
This suits compatible Mercury, Suzuki and Honda fuel-outboard owners who need high-capacity starting and electronics power. Its stated exclusions, 33.5-pound weight and Group 31 dimensions are important fit boundaries.
Full product details
| Brand | Redodo |
|---|---|
| Compatible with Vehicle Type | Cranking Fueled-outboard Motor, Fish Finder, Marine\Boat\Yacht, RV, Trolling Motor |
| Included Components | 2* 12.8V 165Ah battery (Shipped Seperately), Insulating Caps for Bolts, M8-5/8"(16mm) Terminal Bolts |
| Dimensions | 6.77"D x 13"W x 8.5"H |
| Item Weight | 33.5 pounds |
| Manufacturer | Redodo |
| Part Number | R12V165-150-DP-BT-CCA1K2-1 |
| Manufacturer Warranty Description | 5 years warranty |
| Model Number | AE-A1E121B-0D |
| Size | 2 Pack |
| Voltage | 12.8 volts |
Listed on Amazon as: Redodo 2 Pack 12V 165Ah Dual Purpose Lithium Marine Battery
View on Amazon#3 · Bluetooth Monitoring
3. Redodo 12V 100Ah Battery
- Dimensions: 6.69 x 12.13 x 8.31 in
- Weight: 23.1 lb
- Voltage: 12.8 V
Best for: Cold-Weather Bluetooth Starter.
Why it ranks #3: This Group 27 lithium model lists 900 CCA, 1000 MCA, Bluetooth monitoring, and self-heating for charging at -4°F.
Self-heating technology is the defining feature of this Redodo Group 27 battery, with charging specified at temperatures down to -4°F. It also provides 900 CCA and 1000 MCA for fuel-powered outboard starting, while Bluetooth enables phone-based status monitoring and remote power on or off.
The 12.8V, 100Ah battery brings starting and dual-purpose marine use together in a 23.1-pound Group 27 unit measuring 12.13 x 6.69 x 8.31 inches. Bluetooth monitoring and remote power control can help owners check and manage the battery from a phone, while self-heating supports charging in the listed cold conditions. The included insulating caps and M8 terminal bolts address connection preparation, and the dimensions help with compartment planning.
- Self-heating supports charging down to -4°F
- 900 CCA and 1000 MCA ratings
- Bluetooth status monitoring and remote power control
- Group 27 dimensions and connection hardware listed
- Its 100Ah capacity is below the 165Ah marine batteries.
Skip it if you need 165Ah in a dual-purpose marine battery; Redodo’s 12V 165Ah Dual Purpose Lithium Marine Battery provides that listed capacity.
This is suited to boaters who want cold-weather charging support, phone monitoring and outboard starting in a Group 27 battery. The 100Ah capacity sets a clear limit for buyers running larger accessory loads.
Full product details
| Brand | Redodo |
|---|---|
| Battery Weight | 23.1 pounds |
| Included Components | 12.8V 100Ah Dual-Purpose Group27 lifepo4 battery Bluetooth, Insulating Caps for Bolts, M8- 5/8" Terminal Bolts |
| Item Dimensions | 6.69 x 12.13 x 8.31 inches |
| Item Weight | 23.1 pounds |
| Manufacturer | Redodo |
| Model | 12V 100Ah Bluetooth Dual-Purpose Group27 Marine Battery |
| Model Number | AE-A14114B-0B |
| Voltage | 12.8 volts |
| Warranty Description | 5 Years Warranty |
Listed on Amazon as: Redodo 12V 100Ah LiFePO4 Bluetooth Group27 Lithium Marine Battery
View on Amazon#4
4. Redodo 100Ah Two-Pack
- Dimensions: 6.69"D x 12.13"W x 8.31"H
- Weight: 23.1 lb
- Voltage: 12.8 V
Best for: Bluetooth-Monitoring Marine Starter.
Why it ranks #4: The two-pack listing specifies dual-purpose outboard use, 900 CCA, 1000 MCA, Bluetooth, and a Group 27 format.
Bluetooth 5.0 lets the Redodo 100Ah Group 27 battery report its status to a phone, giving boaters a way to check battery information without relying only on a local indicator. It also combines 900 CCA and 1000 MCA cranking power with support for onboard equipment such as a fish finder or live well.
The dual-purpose format is intended to start fuel-powered outboards and supply marine loads, so one unit can cover both roles in a boat’s electrical setup. Its listed 12.8V rating and Group 27 dimensions—12.13 x 6.69 x 8.31 inches—give buyers concrete electrical and space details to compare with their installation. The package includes insulating caps and M8 terminal bolts, which are relevant when preparing the battery connections.
- 900 CCA and 1000 MCA cranking ratings
- Bluetooth 5.0 phone status monitoring
- Supports fuel-powered outboards and onboard loads
- Group 27 dimensions and terminal hardware are specified
- Capacity is 100Ah, below the 165Ah options in this roundup.
Skip it if you need more than 100Ah; Redodo’s 12V 165Ah Dual Purpose Lithium Marine Battery offers greater listed capacity.
This suits boaters who value phone-based status checks and dual-purpose starting and accessory power in a Group 27 format. Its 100Ah capacity is the boundary for buyers planning longer or heavier onboard loads.
Full product details
| Brand | Redodo |
|---|---|
| Compatible with Vehicle Type | Boat, Kayak, Marine, RV, fuel-powered outboard engines |
| Included Components | Bluetooth 12.8V 100Ah Dual-Purpose Group27 lifepo4 battery, Insulating Caps for Bolts, M8- 5/8" Terminal Bolts |
| Dimensions | 6.69"D x 12.13"W x 8.31"H |
| Item Weight | 23.1 pounds |
| Manufacturer | Redodo |
| Part Number | Dual-Purpose Group27 Marine Battery |
| Manufacturer Warranty Description | 5 Years Warranty |
| Model Number | AE-A14114B-0B |
| Size | 2 Pack |
| Voltage | 12.8 volts |
Listed on Amazon as: Redodo 12V 100Ah Dual Purpose Group 27 Lithium Marine Battery -2 Pack
View on Amazon#5
5. LiTime 12V 100Ah Battery
- Dimensions: 7.76"D x 5.2"W x 6.69"H
- Weight: 22.7 lb
- Battery Capacity: 100 amp hours
- Voltage: 12.8 V
Best for: Group 24 Lithium Dual-Purpose Fit.
Why it ranks #5: This Group 24 dual-purpose LiFePO4 battery offers 100Ah and 5000 stated cranking times, but its listing excludes several engine applications.
The LiTime 100Ah battery combines outboard starting and deep-cycle marine power in a Group 24 format, allowing one unit to handle an engine and fishing equipment. Its listed 4000 cycles at 100% depth of discharge also gives buyers a specific cycle-life figure to consider when evaluating regular use.
At 7.76 x 5.2 x 6.69 inches and 22.7 pounds, the battery’s listed dimensions and weight help with compartment and handling decisions. LiTime specifies 12.8V and 100Ah capacity for the combined starting and accessory role, while its cold-weather charging range begins at -4°F. The compatibility exclusions are significant: the listing rules out Yamaha and several other outboards, including models without voltage regulators, so confirm the engine type before installation.
- 100Ah dual-purpose starting and deep-cycle capacity
- Group 24 format with dimensions specified
- 4000 cycles listed at 100% DOD
- Charging range listed down to -4°F
- Not compatible with Yamaha or outboards lacking voltage regulators.
Skip it if you have a Yamaha or an outboard without a voltage regulator; LiTime’s 12V 100Ah Group 31 electric-outboard battery lists Yamaha compatibility.
A fit for buyers seeking a compact Group 24 lithium battery for compatible outboard starts and marine equipment. The listed engine exclusions and regulator requirement are essential boundaries to resolve before choosing it.
Full product details
| Brand | Litime |
|---|---|
| Battery Capacity | 100 amp_hours |
| Compatible with Vehicle Type | Ideal for Marine, Trolling Motor, Boat, Outboard Motor, Not for Yamaha outboard motors, Suzuki, LiveScope fish finder system chargers, or outboard motors lacking voltage regulators (including Evinrude, Johnson, Mercury Black Max). |
| Included Components | Marine Starting Lithium Battery |
| Dimensions | 7.76"D x 5.2"W x 6.69"H |
| Item Weight | 22.7 pounds |
| Manufacturer | LiTime |
| Part Number | L12V100-112.80-DP-BT-CCA900-4-A70-CA |
| Manufacturer Warranty Description | 5 Years warranty |
| Model Number | EA-A14114B-0A |
| Size | Battery Only |
| Voltage | 12.8 volts |
Listed on Amazon as: LiTime 12V 100Ah Dual Purpose Cranking Starting LiFePO4 Battery for Boat
View on Amazon#6
6. Power Queen 12V 100Ah Battery
- Dimensions: 7.79 x 6.53 x 6.69 in
- Weight: 11.6 lb
- Battery Capacity: 100 amp hours
- Voltage: 12.8 V
Best for: Fishing-Day Reserve Power.
Why it ranks #6: Its Group 24 lithium design combines starting and deep-cycle use and lists 900 CCA, making it a compact dual-purpose option.
Smart Power Reserve is the Power Queen 100Ah battery’s distinguishing feature, intended to help protect power for the return trip after a day using trolling motors and marine electronics. It also combines starting and deep-cycle functions, letting a single Group 24 battery serve multiple onboard power needs.
The listing gives this battery a 900 CCA rating and 100Ah capacity, combining starting power with sustained supply for trolling motors and electronics. Its Group 24 dimensions of 7.79 x 6.53 x 6.69 inches and stated 19.8-pound battery weight help owners assess storage and handling. The supplied terminal bolts and insulating caps are useful installation components, while the Smart Power Reserve feature is specifically aimed at retaining power for the return journey.
- Smart Power Reserve for return-trip power
- 900 CCA starting rating
- 100Ah capacity for deep-cycle loads
- Group 24 dimensions and terminal hardware specified
- Capacity is 100Ah, less than the 165Ah dual-purpose choices.
Skip it if you need 165Ah capacity for larger loads; LiTime’s 12V 165Ah Dual Purpose Cranking Battery has the higher listed capacity.
Choose this for fishing trips where a Group 24 battery must combine starting, trolling-motor and electronics power with a reserve feature. Its 100Ah capacity remains the key limit for extended high-demand use.
Full product details
| Brand | power queen |
|---|---|
| Battery Capacity | 100 amp_hours |
| Battery Weight | 19.8 pounds |
| Included Components | 2 x Insulating Caps for Bolts, M8 – 35/64" (14MM) Terminal Bolts, Power Queen 12.8V100Ah Group24 Dual Purpose LiFePO4 Battery, Product Instruction |
| Item Dimensions | 7.79 x 6.53 x 6.69 inches |
| Item Weight | 11.6 pounds |
| Manufacturer | Power Queen |
| Model | EA-114A14D-0A |
| Model Number | 12V100Ah Premium Mini |
| Recommended Uses | Marine Boat : Inflatable Boats, Fishing Boats ,Bass Boat, Pontoon, Kayak, Canoe,Yatch, Mercury,YAMAHA,Suzuki,Honda,Evinrude Outboard Motors, Trolling Motor Minn Kota Newport Motor Guide Haswing Haibo See more |
| Voltage | 12.8 volts |
| Warranty Description | 5-year Warranty |
Listed on Amazon as: power queen 12V100Ah Dual Purpose Deep Cycle Starter Lithium Marine Battery
View on Amazon#7
7. LiTime 12V 165Ah Two-Pack
- Dimensions: 13.11 x 6.93 x 9.45 in
- Weight: 15.19 kg
- Battery Capacity: 165 amp hours
- Voltage: 12.8 V
Best for: High-Capacity Mixed-Load Boaters.
Why it ranks #7: The two-pack title and 165Ah, 1200 CCA claims suit dual-purpose use, but the listing says it is not for Yamaha or Mercury.
The 165Ah capacity pairs with 1200 CCA starting power, letting this LiTime battery crank an outboard while also supplying marine electronics such as fish finders and trolling motors. Its dual-purpose setup can replace a separate starting and electronics battery, a useful way to consolidate onboard power and save space.
LiTime lists compatibility with most Honda, Suzuki, Evinrude, and Tohatsu outboards, alongside ABYC-compliant installation standards; that gives owners of those brands a stated compatibility starting point and installation guidance. Bluetooth and self-heating are also listed, while the specified charging range is -4°F to 122°F. At 33.5 pounds and 13.11 x 6.93 x 9.45 inches, it still takes a substantial battery space, so check the compartment dimensions as well as engine compatibility.
- 165Ah capacity for starting and onboard loads
- 1200 CCA starting power
- Bluetooth monitoring is listed
- Self-heating and a stated -4°F charging lower limit
- Not recommended for Yamaha or Mercury outboards.
Skip it if you run a Yamaha or Mercury outboard; LiTime’s 12V 100Ah Group 31 electric-outboard battery is listed for those brands.
Choose this for a compatible fuel-powered outboard and electronics when one 165Ah battery can serve both jobs. Its size and stated Yamaha and Mercury exclusions make compartment measurements and engine compatibility important boundaries.
Full product details
| Brand | Litime |
|---|---|
| Battery Capacity | 165 amp_hours |
| Battery Weight | 33.5 pounds |
| Compatible Phone Models | Outboard Motor, Marine, Trolling Motor, Boat |
| Included Components | 1*12V 165Ah Starting Battery |
| Item Dimensions | 13.11 x 6.93 x 9.45 inches |
| Item Weight | 15.19 kg |
| Manufacturer | LiTime |
| Model | L12V165-150-DP-BT-CCA1K2-4-A100 |
| Model Number | DA-A2111EB-0D |
| Recommended Uses | Not for Yamaha, Mercury outboard motors; Ideal for Outboard Motor, Marine, Trolling Motor, Boat |
| Voltage | 12.8 volts |
| Warranty Description | 5 Years warranty |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including lead and lead compounds which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov |
Listed on Amazon as: LiTime 12V 165Ah Dual Purpose Cranking LiFePO4 Battery for Boat (2-Pack)
View on Amazon#8 · AGM Alternative
8. MARXON Group 27M Battery
Best for: Group 27M Lead-Acid Replacement.
Why it ranks #8: This 12V AGM dual-purpose marine battery lists 800 CCA, 1040 MCA, 92Ah, and 175 minutes of reserve capacity.
The MARXON Group 27M combines 800 CCA starting power with 92Ah capacity and a listed 175-minute reserve capacity, giving boat owners one battery specified for engine starts and sustained marine loads. Its dual-purpose format is the central benefit for installations where starting and accessory power share a battery.
The 12V battery measures 12.05 x 6.61 x 8.19 inches, so the stated Group 27M size helps buyers compare it with an existing marine battery space. Its 800 CCA rating addresses engine-starting demand, while 92Ah and 175RC provide additional capacity and reserve specifications for planning accessories. The listing includes screws and nuts and notes terminals of two different sizes, useful details when checking connection requirements before installation.
- 800 CCA starting rating
- 92Ah capacity for dual-purpose use
- 175-minute reserve capacity listed
- Two terminal sizes and screws and nuts included
- Its 92Ah capacity is lower than the 100Ah and 165Ah options.
Skip it if you want at least 100Ah; Power Queen’s 12V 100Ah Dual Purpose battery has a higher stated capacity.
Consider this Group 27M option if its 92Ah, 800 CCA and 175RC specifications match your boat’s needs. Buyers seeking greater stated capacity should compare the 100Ah or 165Ah batteries instead.
Full product details
| Brand | MARXON |
|---|---|
| Compatible with Vehicle Type | marine rv |
| Included Components | battery, Screws and nuts |
| Manufacturer | Leoch battery |
| Part Number | AGM27M-92R-B |
| Manufacturer Warranty Description | 2 years |
| Model Number | group 27M |
| Size | group 27M |
Listed on Amazon as: Group 27M Marine Battery Dual Purpose 12V 92Ah 1040MCA 800CCA 175RC
View on Amazon#9 · Electric Outboard
9. LiTime 12V 100Ah OBM Battery
- Dimensions: 13.11 x 6.77 x 8.5 in
- Weight: 10.24 kg
- Battery Capacity: 100 amp hours
- Voltage: 12 V
Best for: High-Surge Electric Outboard Power.
Why it ranks #9: Designed for electric outboards, it supports stated 500A one-second surges and 24V–60V motors, not conventional fuel-engine cranking.
A 500A surge for one second is the LiTime battery’s defining electric-outboard specification, supporting listed 24V–60V motors and heavy load demands. Its 1.5C discharge capability for three minutes and 100Ah capacity target electric propulsion rather than the fuel-outboard cranking focus of many marine batteries.
The listing says setups can use five batteries in series and five in parallel for 32kWh output, and supports motors up to 51HP; those details help buyers planning a larger electric propulsion bank. Bluetooth monitoring and ABYC-compliant installation standards are also specified. Each battery is 12V and 22.6 pounds, so a multi-battery arrangement requires planning for the combined space and weight as well as the stated motor and system requirements.
- 500A surge for one second
- Supports listed 24V–60V electric outboard motors
- 1.5C discharge for three minutes
- 5P5S configuration listed for 32kWh output
- Its electric-outboard focus does not list fuel-engine cranking ratings.
Skip it if you need a listed fuel-outboard cranking rating; Redodo’s 12V 100Ah Bluetooth Group27 marine battery specifies 900 CCA.
Choose this for electric outboard systems needing the listed surge capability and scalable battery configurations. It is not the clearest match for buyers seeking a specified CCA rating for a fuel-powered engine.
Full product details
| Brand | Litime |
|---|---|
| Battery Capacity | 100 amp_hours |
| Battery Weight | 22.6 pounds |
| Included Components | 2 * 12V 100Ah Bluetooth OBM LiFePO4 Battery, 4 * Flat Washer, 4 * Insulation Caps, 4 * M8 – 5/8" (16MM) Terminal Bolts, Product Manual |
| Item Dimensions | 13.11 x 6.77 x 8.5 inches |
| Item Weight | 10.24 kg |
| Manufacturer | LiTime |
| Model | 12V 100AH Group 31 OBM |
| Model Number | EA-A14114J-0D |
| Recommended Uses | Trolling Motor, Electric Outboard Motor, Marine, RV, Boat, Home Energy Storage, Solar Power Storage, Backup Power See more |
| Voltage | 12 volts |
| Warranty Description | 5 Year After-sale service |
Listed on Amazon as: Litime 12V 100Ah LiFePO4 Marine Battery for Electric Outboard Motors(2Pack)
View on AmazonAvoid a charging-system compatibility mismatch
A battery’s stated engine compatibility does not guarantee that it will work with every outboard in that brand’s lineup. The LiTime 12V 165Ah Battery excludes Yamaha and Mercury in its specifications, despite broader compatibility wording elsewhere in its listing. Redodo 12V 165Ah Battery names Mercury except Optimax, Suzuki, and Honda, and excludes engines without voltage regulators, including certain Evinrude, Johnson, and Mercury Black Max models.
LiTime 12V 100Ah Battery also lists several exclusions, including outboards without voltage regulators. These are important traps: lithium chemistry, a high CCA figure, or a matching nominal voltage alone does not establish charging compatibility.
Check the exact engine model and its charging-system requirements against the battery maker’s current compatibility information before purchase. If the fit is unclear, get confirmation rather than assuming a brand-level match applies.
Separate fuel-engine starting from electric propulsion
A battery intended to crank a fuel outboard is not automatically the right choice for powering an electric outboard. Most options here are described as dual-purpose batteries for engine starting and electronics; LiTime 12V 100Ah OBM Battery instead targets electric outboards and lists 500A one-second surges, 24V–60V motors, and a 1.5C discharge for three minutes. Its specifications also list a 12V battery, so the required system voltage and series configuration matter.
Do not interpret its stated support for higher-voltage motors as meaning that one battery alone supplies those voltages. Confirm the motor’s voltage, required battery arrangement, continuous load, and installation guidance.
For a conventional fuel outboard with electronics, compare cranking specifications such as the listed 800–1200 CCA figures and choose a compatible dual-purpose model instead.
How to Choose an Outboard Battery
Cranking power
Look for a CCA or MCA rating that meets the outboard maker’s requirement, rather than choosing solely by amp-hour capacity. Listed starting figures range from MARXON Group 27M Battery’s 800 CCA and 1040 MCA to the 1200 CCA claims on LiTime 12V 165Ah Battery and Redodo 12V 165Ah Battery; Redodo’s 100Ah model lists 900 CCA and 1000 MCA. These figures help compare products, but they do not replace checking the engine manual or confirming rating conditions.
Buyers with larger engines or demanding starts should focus on the required starting rating and verify fit with the manufacturer. Smaller setups should still meet the engine’s stated minimum rather than selecting an underspecified battery.
Capacity and onboard loads
Choose amp-hours according to the runtime your electronics and other loads need, while keeping starting needs in view. Listed capacity ranges from MARXON Group 27M Battery at 92Ah to the 165Ah LiTime and Redodo models; several lithium options provide 100Ah. Redodo 12V 165Ah Battery also lists 2112Wh, while the smaller models may suit a boat with fewer or shorter-duration loads.
More capacity can support longer electronics use, but it does not by itself prove that a battery suits an engine or a trolling motor. Buyers running fish finders and other equipment for extended trips may prefer a higher-capacity model; those with limited onboard space or lighter loads may consider 100Ah options after checking dimensions and requirements.
Battery type, format, and intended use
Match the battery’s chemistry, physical format, and purpose to your installation before comparing convenience features. Most options are LiFePO4, while MARXON Group 27M Battery is a 12V AGM model; the lithium listings include Group 24 and Group 27 formats, and LiTime 12V 100Ah OBM Battery is aimed at electric propulsion. Dimensions vary, so compare the listed measurements with the tray, terminals, and cable layout on your boat.
The AGM model may suit a buyer who specifically needs that battery type, while lithium dual-purpose models suit buyers seeking one unit for cranking and electronics, subject to compatibility. Electric-outboard owners should assess the dedicated OBM model against the motor’s voltage and configuration rather than choosing a fuel-outboard starter battery by default.
Which Outboard Battery Should You Choose?
For a fuel outboard needing both starting and electronics power, choose LiTime 12V 165Ah Battery if its compatibility exclusions do not apply; its 1200 CCA and 165Ah lead this group. If you need a two-battery set with high capacity, consider Redodo 12V 165Ah Battery, but verify its engine exclusions and pack arrangement. For a 100Ah lithium option with Bluetooth and self-heating, Redodo 12V 100Ah Battery lists 900 CCA and 1000 MCA.
Choose MARXON Group 27M Battery if you specifically want AGM. Electric-outboard owners should consider LiTime 12V 100Ah OBM Battery, confirming the required series setup and motor voltage.
In every case, check the exact engine charging requirements, starting rating, battery dimensions, and whether the listing’s included quantity matches your plan.
Related Buying Guides
- Best Battery Powered Outboard Motor
- Best Outboard Motor Cover
- Best Electric Outboard Motors
- Best Paint For Outboard Motor
- Best Portable Outboard Motor
Frequently Asked Questions
How can I check whether a lithium marine battery is compatible with my outboard’s charging system?
Check your outboard manufacturer’s charging requirements and compare them with the battery listing’s charging limits and compatibility notes. If either source is unclear, ask the engine or battery manufacturer before connecting the battery. Also verify the exact engine model, since a listing may exclude particular brands even when it is described as marine-compatible.
How much battery capacity does my outboard and onboard equipment need?
Estimate capacity from your engine’s starting requirements and the energy use of electronics and other equipment during a typical trip. Add the expected loads over time, then account for the battery’s usable capacity and your desired reserve. Check the engine and equipment manuals; do not choose by amp-hour rating alone.
Can I replace a lead-acid outboard battery with a LiFePO4 battery without changing the installation?
Not necessarily. Confirm that the LiFePO4 battery supports your engine’s charging system and starting needs, and check the battery’s dimensions, terminals, and installation instructions against your existing setup. Some installations may need changes or additional equipment.
Verify the exact requirements with the engine and battery manufacturers before replacing the lead-acid battery.
How should I verify a battery’s starting rating?
Compare the battery’s stated cranking rating with the starting requirement in your outboard manual, using the same rating type and conditions where specified. A capacity figure such as amp-hours does not by itself establish starting suitability. If the listing does not provide a rating your engine requires, confirm compatibility with the manufacturer before purchase.
What should I check before choosing a two-pack?
Confirm that the included quantity fits your plan and whether the batteries are intended to be used separately or connected together. Check the required voltage and wiring arrangement for your engine or equipment, along with each battery’s dimensions and compatibility notes. Do not assume a two-pack is suitable for a particular series or parallel setup.
Final Words
For a fuel outboard that also powers electronics, the LiTime 12V 165Ah option is the strongest all-around match, provided your engine is not among its stated exclusions. Consider a lower-capacity battery if it suits your boat, or the dedicated electric-outboard model for propulsion loads. Before deciding, verify charging compatibility, starting requirements, dimensions, and included quantity; confirm any multi-battery wiring plan for your equipment.
