12V 100Ah LiFePO4 Battery 2-Pack - Best for Trolling Motors

In this review of the 12V 100Ah TM LiFePO4 Lithium Battery 2-pack, the bottom line is simple: this set is aimed at boaters and RV owners who need lightweight, long-lasting power for a trolling motor or house loads. The reviewer found the standout reason to buy is the combination of a true Group 24 footprint and built-in smart features like Bluetooth monitoring and a protective BMS that automatically cuts off and recovers charging at low temperatures, making it a practical upgrade from heavy lead-acid banks.

Key Features

• Lightweight Group 24 form: At about 23.15 lbs and compact dimensions, the battery is nearly three times lighter than equivalent lead-acid units, easing installation and handling on boats and campers.
• Smart Bluetooth monitoring: The Bluetooth app provides real-time battery status and allows naming the unit, so users can track state of charge and health even while underway.
• 120A BMS protection: The integrated BMS prevents overcharge, over-discharge, overcurrent and short circuits, improving safety and battery longevity for deep cycle use.
• Low-temperature automatic cutoff: Charging is automatically suspended below 0C / 32F and resumes above 5C / 41F to protect cells from cold damage during winter use or cold-water outings.
• Rugged, waterproof design: IP67 protection and a robust housing make the battery suitable for marine environments where spray and occasional exposure are concerns.
• Long cycle life: EVE Grade A+ cells and LiFePO4 chemistry promise up to 15,000 cycles and a design life approaching 10 years under typical conditions.

Who It's For

This 2-pack is best for anglers using trolling motors in the 30 to 70 lb thrust range who want longer run times without the weight penalty of lead-acid batteries. It also suits van and RV owners who need reliable 12V house power, and anyone wanting remote battery telemetry via Bluetooth.

Customers seeking the absolute cheapest short-term option or those who need extremely high short-duration cranking amps for starter motors should look elsewhere; this pack is optimized for deep-cycle performance, longevity, and marine durability rather than starter duty.

Pros & Cons

Pros

• Much lighter and more compact than comparable lead-acid batteries, simplifying mounting and transport.
• Bluetooth app gives convenient, real-time insight into battery health and charge state while underway.
• Built-in 120A BMS and automatic low-temp cutoff provide strong protection and recovery behaviors without user intervention.
• IP67 rating and rugged construction make it suitable for marine and outdoor use.

Cons

• Designed for deep-cycle loads; not intended as a direct replacement for high-current engine starter batteries.
• Some users may prefer a single larger battery instead of managing a 2-pack for certain installations.

Specifications

Nominal Voltage	12V
Capacity	100Ah (per battery), 2-pack included
BMS Rating	120A with overcharge/over-discharge/short-circuit protection
Dimensions	10.2 x 6.6 x 8.2 in (Group 24 size)
Weight	Approximately 23.15 lbs per battery
IP Rating	IP67 waterproof
Cell Type / Life	EVE Grade A+ LiFePO4 cells, up to 15,000 cycles

Our Verdict

The 12V 100Ah LiFePO4 2-pack delivers excellent deep-cycle performance, smart monitoring, and marine-ready durability for anglers and RV owners who value weight savings and longevity. Its Bluetooth monitoring and robust BMS add practical safety and convenience, making it good value for users replacing heavy lead-acid banks or building a reliable trolling motor power system.

Frequently Asked Questions

Can these batteries be charged in cold weather?
They include automatic cutoff below 0C / 32F and will resume charging above 5C / 41F to protect the cells.

Is the pack waterproof for marine use?
Yes, the batteries are rated IP67, which protects against dust and temporary immersion or heavy spray commonly encountered on boats.

Will this replace a lead-acid trolling motor battery?
Yes for deep-cycle trolling motors in the 30-70 lb range; the LiFePO4 pack provides similar capacity with much less weight and longer life.