12V 100Ah LiFePO4 Battery Group 24 - Compact Marine Power

In this review the 12V 100Ah LiFePO4 Group 24 battery is examined for anglers, RV owners, and anyone needing a lightweight deep cycle power source; its single biggest selling point is the combination of full 100Ah usable capacity in a compact, 21 lb package that replaces a Group 24 lead-acid battery without rewiring. The review highlights real-world use with trolling motors and small solar systems and notes the built-in 100A BMS as the reason this battery can be used confidently for marine and mobile power needs.

Key Features

• Group 24 form factor: Fits standard Group 24 battery boxes and swaps in for old AGM or lead-acid batteries with no extra wiring required.
• 1280Wh usable energy: Provides full 12.8V 100Ah capacity for longer run times on trolling motors and small appliances compared with same-size lead-acid options.
• 100A built-in BMS: Protects against overcharge, over-discharge, over-current, over-voltage, overload, and short circuits so the battery can be used in boats and RVs with confidence.
• Lightweight and compact: At about 21 lbs and roughly 35% smaller volume than traditional packs, it is much easier to carry and install in tight compartments.
• Long cycle life: LiFePO4 chemistry gives up to 15000 cycles at moderate depth of discharge and an expected service life near 10 years with proper charging and maintenance.

Who It's For

This battery is ideal for anglers and small-boat owners running 30-70 lb trolling motors who want more usable energy and less weight than lead-acid options, and for RV or off-grid users needing a compact, transportable 12V deep cycle battery. It also suits DIY solar setups and backup power where a Group 24 footprint is required.

Those who need higher continuous discharge than the built-in 100A BMS allows, or who require a fully weatherproof pack without adding a separate waterproof case, should consider other configurations. Buyers planning large parallel or series banks should follow the voltage balancing guidance and match batteries by brand, capacity, and purchase time.

Pros & Cons

Pros

• High usable energy density in a true Group 24 size makes installation and replacement simple.
• Built-in 100A BMS provides comprehensive protection for marine and vehicle use.
• Very light at about 21 lbs and faster to charge than comparable lead-acid batteries.

Cons

• Not supplied in a waterproof case, so boat users should budget for a suitable waterproof box for exposed installations.

Specifications

Nominal voltage	12.8V
Capacity	100Ah (1280Wh)
Battery size	BCI Group 24
BMS rating	Built-in 100A protection
Weight	Approximately 21 lbs
Chemistry	LiFePO4 (Lithium Iron Phosphate)
Cycle life	Up to 15000 cycles (60% DOD) and up to 10 year service life

Our Verdict

The 12V 100Ah Group 24 LiFePO4 battery is a practical, high-value replacement for lead-acid Group 24 batteries when you need lightweight deep cycle power. It offers long life, strong built-in safety via the 100A BMS, and the same footprint as common Group 24 batteries, making it a smart buy for boaters, RV owners, and small solar systems who are willing to add a waterproof case for exposed marine installs.

Frequently Asked Questions

Can this battery be used with a trolling motor rated 70 lbs?
Yes, the 12.8V 100Ah Group 24 battery is suitable for 30-70 lb trolling motors, but confirm the motor's continuous current draw stays within the BMS limits.

Can multiple batteries be connected together?
Yes; when connecting in series or parallel, match batteries by capacity and brand, charge each to >13.4V first, and follow the voltage-balancing steps in the product notes.

Is a waterproof case included for marine use?
No, a waterproof box is recommended for exposed marine installations and should be purchased separately.