Power Queen 2PACK 12V 100Ah Group 24 LiFePO4 Battery - Long Life Power

In this review of the Power Queen 2PACK 12V 100Ah Group 24 LiFePO4 Battery, the bottom line is simple: this two-pack is best for owners of trailers, RVs, marine craft or small solar systems who want a straightforward, lightweight upgrade from lead-acid. The single biggest reason to buy is the combination of Grade-A cells and an upgraded 100A BMS that protects against overcharge, over-discharge, over-current and short circuits while delivering substantial usable capacity and a much lower weight than equivalent lead-acid batteries.

Key Features

• Grade-A battery cells: Four premium LiFePO4 cells provide higher energy density and stable performance for demanding deep-cycle use.
• Upgraded 100A BMS: Built-in protection guards against overcharge, over-discharge, over-current, over-voltage, overload and short circuits for safer operation.
• Group 24 size compatibility: The case meets the BCI minimum for Group 24 so it fits many existing mounts and replaces lead-acid without rewiring.
• Long expected lifespan: Rated for up to 10 years with cycle life options from 4,000 cycles at 100% DOD to 15,000+ cycles at 60% DOD, reducing long-term replacement costs.
• Series and parallel support: Can be connected in series or parallel (up to 4P4S) for higher voltage or capacity, enabling larger 51.2V battery banks.
• Efficient charging recommendation: Charging at 14.6V and about 20A fully charges a 100Ah unit in roughly five hours, allowing predictable recharge planning.

Who It's For

The Power Queen 2PACK is ideal for RV travelers, trailer owners and small marine or off-grid solar users who want to drop in a lighter, longer-lasting alternative to lead-acid batteries without modifying their wiring. Its Group 24 sizing and robust BMS make it especially useful when users need reliable deep-cycle performance and safety protections.

It is not intended as a starter battery for engines or golf carts, so anyone needing high cranking amps for starting should look elsewhere. Also, installers should follow the terminal attachment guidance if using thin mounting plates or clamps to avoid loosening or overheating.

Pros & Cons

Pros

• High-quality Grade-A cells deliver consistent deep-cycle performance and improved energy density compared with lead-acid.
• Upgraded 100A BMS provides comprehensive protection for safer, low-maintenance use.
• Half the weight of equivalent lead-acid batteries makes handling and installation far easier.
• Long lifespan and high cycle ratings offer strong value over time for frequent use.

Cons

• Not designed as a starter battery, so it should not be relied on for engine starting applications.
• Proper terminal fastening is required when using thin hardware to prevent loosening or heat issues.

Specifications

Nominal voltage	12.8V
Capacity	100Ah (1280Wh per battery)
Cell type	LiFePO4 Grade-A cells
BMS rating	Upgraded 100A BMS
Group size	Group 24 (BCI minimum compliant)
Cycle life	4000 cycles @100% DOD; 6000+ @80% DOD; up to 15000+ @60% DOD
Recommended charge	14.6V, 20A (approx 5 hrs for full charge)

Our Verdict

The Power Queen 2PACK 12V 100Ah LiFePO4 is a practical, cost-effective deep-cycle solution for RVs, trailers, marine and small solar systems because it pairs Grade-A cells with a robust 100A BMS and a convenient Group 24 form factor. For users who prioritize weight savings, long cycle life and safety features over starter-cranking ability, this two-pack represents excellent long-term value.

Frequently Asked Questions

Can these batteries be used together for higher voltage?
Yes; the batteries support series and parallel connections and can be configured up to a 4P4S setup for larger banks like 51.2V systems.

Are these batteries suitable for engine starting?
No; these are energy storage deep-cycle batteries and are not recommended as starter batteries for engines or golf carts.

How long until a full charge?
At the recommended 14.6V and approximately 20A charging current, a 100Ah unit takes about five hours to fully charge.