Battle Born BB10012 LiFePO4 12V 100Ah Deep Cycle Battery

Battle Born BB10012 is Lithium Iron Phosphate (LiFePO4) deep cycle battery with a nominal voltage of 12 volts and capacity of 100 Ah and is designed as a direct replacement of wet/flooded, AGM and Gel-Cell batteries in many deep cycle applications, including RV house battery, electric trolling motor battery, off-the-grid applications, and similar.

Battle Born BB10012 stands out from other lithium batteries because of its Battery Management System (BMS), which allows this battery to be freely connected in series and parallel with other Battle Born BB10012 batteries in order to create large(r) battery packs.

Published: June 1, 2020.

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Features and Specifications

Battle Born BB10012 features physical dimensions of (L x W x H) 12.75 x 6.875 x 9 inches (~32.4 x 17.5 x 22.9 cm) and it weighs 31 pounds (~14.0 kg).

Battle Born BB10012 belongs to BCI Group 31 batteries (13 x 6.8125 x 9.4375 inches, 330 x 173 x 240 mm), although it often can fit 'larger' battery compartments intended for BCI Group 27 batteries (12.0625 x 6.8125 x 8.875 inches, 306 x 173 x 225 mm).

Nominal voltage is 12 volts - the battery itself operates at 12.8 volts. Also, nominal capacity is 100Ah, but the battery is able to provide 20 Amps for 5 hours - unlike lead-acid batteries which lose effective capacity with the increase of discharge current, a capacity loss of the lithium-ion batteries is almost negligible.

Thanks to the lithium-ion technology, Battle Born 10012 battery weighs on average 2-2.5x less than the similar 100Ah 12V Group 31 batteries.

However, when the batteries are discharged with higher currents, for example, 50 Amps, the actual capacity of Battle Born 10012 is 'almost' 100 Ah, and the actual capacity of the most 100Ah AGM/Gel-cell batteries drops down to ~60-65 Ah, increasing the effective weight difference to 3.33 - 4.17x.

Battle Born BB10012 battery comes with a very sophisticated Battery Management System (BMS) that is updated from time to time.

At the moment, BMS protects the battery from High/Low voltage (>14.7 volts or <10 volts), High/Low temperature (>135 F or <25 F) and short-circuit connections, automatically balances cells and ensures that the battery can provide reliably 100 Amps continuously and up to 150-200 Amps for 30 seconds.

Also, to allow the battery to power larger motors, BMS is able to provide 0.5 seconds larger power surges. However, if the battery is going to be connected to power inverters (4000+ watts) and similar loads with high input capacitance, the battery, and its BMS must be protected using current surge limiter, preferably Battle Born CSL500 Current Surge Limiter model.

Another great advantage of Battle Born BB10012 over lead-acid batteries is that it can withstand 3000-5000 deep charging/discharging cycles using 0.5C (50 Amps) charging current, allowing the battery to be recharged in approximately 2 hours.

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How to Charge Battle Born BB10012 Battery?

One of the great features of the Battle Born BB10012 battery is that it can be charged with AGM lead-acid battery chargers, even if they don't have a mode for charging the lithium-ion batteries.

When charging the battery use Bulk/Absorption voltage of 14.2 - 14.6 volts and float voltage of 13.4 and 13.8 volts.

Equalization and temperature compensation by battery chargers are not needed.

Note: for exact charging procedures, and in order to get accustomed to your new battery, check the Owner's Manual that comes with the battery.

Although the battery is able to accept relatively large charging currents, keeping them somewhat lower (for example, ~25 Amps) can prolong the battery operating life and avoid overheating.

Since most modern intelligent 25 Amps AGM battery chargers also include lithium battery charging mode, such devices are highly recommended. After all, when the Battle Born BB10012 is discharged down to 100% DoD, it takes some 4 hours for such a charger to fully charge the battery.

Connecting the Battle Born BB10012 in Series and Parallel

Another great feature of the Battle Born BB10012 is that it can be freely connected in series in order to create 24V, 36V, and 48V lithium battery packs and in parallel in order to create lithium battery packs with 200Ah, 300Ah, etc. capacity.

Also, when the batteries are connected in parallel, output currents are multiplied too - for example, 3 batteries connected in parallel feature capacity of 300Ah and are able to provide 300 Amps continuously, and 450-600 Amps for 30 seconds.

When connecting multiple batteries, especially in parallel, be sure that the cables are properly dimensioned in both length and thickness.

Battle Born BB10012 as Starting Battery

Battle Born BB10012 is not designed as a starting battery - it is a premium deep-cycle lithium battery that comes at an affordable price (for lithium battery) and it should be used as such.

It is possible to crank a really small internal combustion engines that require less than 100 cranking Amps, but why risk battery like Battle Born BB10012, when such task can be done using far cheaper AGM motorcycle starting battery.

Battle Born BB10012 as RV House Battery

As the RV house battery, Battle Born BB10012 is an excellent choice for people looking for a reliable and lightweight power source that can be recharged quickly using mains power or a power generator.

Weight savings is especially noticeable when larger battery packs are used. For example:

- 4x Battle Born BB10012 batteries weigh 124 pounds (~56.2 kg) and feature 12V and 400 Ah.

- 4x Renogy RNG-BATT-AGM12-100 (very balanced deep-cycle AGM battery) batteries weigh 264 pounds (~119.6 kg) and feature 12V and 416 Ah when being discharged for 20h.

But, when these batteries are being discharged faster, their actual capacity decreases - for example, when being discharged for 5 hours down to 10.5 volts, the actual capacity of the RNG-BATT-AGM12-100 drops down to 88 Ah (352 Ah for 4-battery battery pack), while Battle Born BB10012 feature an actual capacity of 100Ah (400 Ah for 4-battery battery pack).

This capacity difference is even larger when the battery pack is decreased even faster.

If You are looking for lightweight RV house batteries that may be charged and discharged rather fast with no adverse effects on the battery and its capacity, consider Battle Born BB10012 battery.

Battle Born BB10012 as Trolling Motor Battery

electric trolling motor w200pxBattle Born BB10012 battery is commonly used as a lightweight electric trolling motor battery where weight savings justify the higher initial price.

The maximum discharge current of electric trolling motors is in the 50-60 Amps range and Battle Born BB10012 battery can provide such currents with ease.

And since electric trolling motors are rarely used at full throttle all the time, operating time of the Battle Born BB10012 battery can be rather long - 5 hours at 20 Amps, for example.

Note: If You are using your electric trolling motor almost all the time at full throttle, then your electric trolling motor is seriously underpowered and it must be replaced with a stronger unit for safety reasons - and such unit requires a battery (or battery pack) with larger capacity, often leading to the weight increase ... hence, lithium trolling motor batteries may be of great help, especially on the kayaks, pontoons, inflatable boats, and similar.


battle born bb10012 w200pxLong Story Short: If You are looking for a lightweight deep-cycle battery for your trolling motor, RV, ATV, etc. consider Battery Born BB10012 battery.

Unlike lead-acid batteries that can withstand some 400-500 charging/discharging cycles down to 70-80% DoD, Battery Born BB10012 can withstand 3000-5000 cycles, especially if the charging current is kept below 0.5C (that is 50 Amps!).

Although initially, Battery Born BB10012 costs more than lead-acid batteries, in the long run it is actually much more cost-effective.

For more reviews and recommendations, feel free to check Battle Born BB10012 LiFePO4 Deep Cycle Battery Amazon link (link opens in the new window).