Power Queen LiFePO4 Battery 12V 100Ah Group 31 - Lightweight Deep

Our review of the Power Queen LiFePO4 Battery 12V 100Ah Group 31 finds it best suited for RV owners, solar users, and anyone needing a compact, long-lasting house battery rather than a starter battery. The single biggest reason to buy is its combination of high usable energy and low weight: at about 24.25 lbs and delivering 1280Wh with a long cycle life, it replaces much heavier lead-acid batteries while freeing up space and easing installation. This review focuses on real-world usability, charging behavior, and the built-in protections that matter most for off-grid and mobile power.

Key Features

• Compact and lightweight: At L13 x W6.77 x H8.43 in and roughly 24.25 lbs, it is about half the weight of comparable lead-acid batteries, which makes handling and installation much easier.
• High usable energy: The 12.8V 100Ah chemistry provides approximately 1280Wh of energy, offering extended run time for appliances, trolling motors, and onboard systems.
• Built-in 100A BMS: Integrated battery management protects against overcharge, over-discharge, over-current and short circuit, giving peace of mind for daily use.
• Fast charging: With a 14.6V 20A LiFePO4 charger the battery reaches a full charge in about 5 hours, cutting charge time roughly in half versus similar lead-acid setups.
• Expandable configuration: Supports series and parallel connections up to 4S or 4P for higher voltage or up to 400Ah capacity when multiple batteries are paired.
• Long life and efficiency: Rated for thousands of cycles (noted as 4000+), which means far lower replacement and lifecycle costs compared with lead-acid options.

Who It's For

The Power Queen 12V 100Ah is ideal for RV and van owners, marine users, and off-grid solar installations where a lightweight, space-saving deep cycle battery is needed. It is particularly useful for people who need frequent cycling, such as weekend campers or small solar systems, and for applications like power wheelchairs where weight and compact size matter.

This battery is not intended as a starter battery for engines or for golf car starting use; buyers needing high cranking amps for engine starts should look elsewhere. Also, anyone requiring integrated Bluetooth telemetry should verify the specific model, since Bluetooth is offered on certain group sizes but not every configuration.

Pros & Cons

Pros

• Lightweight and compact design reduces installation effort and saves storage space.
• Built-in 100A BMS provides critical protections for longevity and safe operation.
• Fast 5-hour charge capability with appropriate charger speeds up turnaround between uses.
• High cycle life and energy density deliver better long-term value than lead-acid.

Cons

• Not suitable as a starting battery; users must ensure their application is for energy storage only.
• Some advanced features such as Bluetooth monitoring depend on the chosen group size and model variant.

Specifications

Battery type	LiFePO4 deep cycle
Nominal voltage	12.8V
Capacity	100Ah (approx. 1280Wh)
Size (L x W x H)	13 x 6.77 x 8.43 in
Weight	About 24.25 lbs
Built-in protection	100A BMS (overcharge, discharge, over-current, short)
Cycle life	4000+ cycles

Our Verdict

The Power Queen 12V 100Ah LiFePO4 is a practical, value-oriented choice for RV, marine, and solar users who want a lightweight, high-cycle battery that replaces heavier lead-acid banks. It delivers reliable capacity, fast charging with the right charger, and essential built-in protection, making it a smart long-term investment for energy storage applications rather than engine starting.

Frequently Asked Questions

Can this battery be used to start a vehicle?
No. This Power Queen 12V 100Ah LiFePO4 is designed as an energy storage deep cycle battery and is not recommended for starting engines.

How many batteries can be connected together?
It supports series and parallel connections up to 4S or 4P so systems can be expanded to higher voltage or up to about 400Ah capacity when paralleled.

What charger should be used?
Use a LiFePO4 charger or a 14.6V 20A LiFePO4-compatible charger to achieve the advertised 5-hour fast charge and to avoid charging issues.