Capacity is not the differentiator here: a 12V 100Ah LiFePO4 battery stores about 1,280 Wh whoever makes it. What separates them is what you can't see. Based on manufacturer specs and public reviews; verify every figure on the current datasheet because brands release frequent sub-variants.
The five specs to compare
- BMS continuous current (often 100 A, sometimes more or less): sets the inverter size one battery can feed.
- Low-temperature charge protection or heating: essential for unheated cabins.
- Cycle rating and its test conditions: depth of discharge and end-of-life threshold matter.
- Series/parallel limits: important if you plan 24 V or 48 V later.
- Warranty and local support: who handles a claim in your country?
| Model | Capacity | Voltage | Weight | Cycle life | Chemistry |
|---|---|---|---|---|---|
| Battle Born BB10012 (12V 100Ah) | 100 Ah | 12.8V nominal | See spec sheet | See spec sheet | LiFePO4 |
| LiTime 12V 100Ah LiFePO4 | 100 Ah | 12.8V nominal | See spec sheet | See spec sheet | LiFePO4 |
"check" = not confirmed on the sources we used; verify on the manufacturer page before buying.
Cabin or RV bank where support matters
Battle Born BB10012 (12V 100Ah)
Best for: Cabin or RV bank where support matters
| Capacity | 1,280 Wh |
|---|---|
| Voltage | 12.8V nominal |
| Weight | See spec sheet |
| Cycle life | See spec sheet |
| Chemistry | LiFePO4 |
| Capacity | 100 Ah |
| Made by | Dragonfly Energy (USA) |
Strengths
- US-assembled, long-established in RV/off-grid market
Watch-outs
- Premium price class; compare warranty terms
Specs: manufacturer / retailer spec sheets (source 1). Prices change daily, so we do not print them.
| Capacity | 1,280 Wh |
|---|---|
| Voltage | 12.8V nominal |
| Weight | See spec sheet |
| Cycle life | See spec sheet |
| Chemistry | LiFePO4 |
| Capacity | 100 Ah |
Strengths
- Value option frequently compared in DIY forums
Watch-outs
- Several sub-variants (mini, low-temp, Bluetooth): check the exact model
Specs: manufacturer / retailer spec sheets (source 1). Prices change daily, so we do not print them.
Battery or power station?
A bare battery needs a charger, a controller, an inverter, fuses and cables. If you just want backup power at home, a power station bundles all of that safely. Bare batteries shine in DIY cabin and boat systems.
Transfer switches, power inlets, sub-panels and hard-wired batteries change your home's wiring. In most places this legally requires a licensed electrician and sometimes a permit and utility notification. This page explains the options so you can talk to an electrician, it is not installation instructions.
Lithium batteries store a lot of energy: use correctly rated fuses and cables, and have fixed installations designed or checked by a qualified electrician.
FAQ
How many watt-hours is a 12V 100Ah LiFePO4 battery?
Nominal voltage is 12.8 V, so 12.8 × 100 = 1,280 Wh. LiFePO4 allows a deep usable share, though many owners keep a small reserve.
Can I connect several in parallel or series?
Most manufacturers allow parallel (more capacity) and some allow series (24/48 V), with limits on the number. Use identical batteries of the same age and follow the manual.
Can I replace a lead-acid battery with LiFePO4?
Often, but your charger and controller need a LiFePO4 (or user-defined) charging profile. Vehicle alternator charging may need a DC-DC charger.
What is BMS current and why does it matter?
The battery management system limits continuous discharge current. A 100 A BMS at 12.8 V supports about 1,280 W continuous; enough for many inverters, not for large ones without paralleling batteries.