The MillerTech 12V 100Ah Group 31 Deep Cycle Battery is one of MillerTech's best-selling batteries, delivering reliable, high-capacity power in a durable, custom-molded Group 31 case. With 1280Wh of energy, it’s perfect for powering larger trolling motors from dawn to dusk. This model offers Bluetooth monitoring for real-time battery status and a reclosable, heavy-duty case for easy maintenance and secure mounting. IP65 marine-rated with a stainless steel breather vent, it’s designed to withstand marine environments without condensation buildup. Equipped with large terminals to handle maximum power, this battery comes with a 10-year warranty and is built on MillerTech's commitment to quality and customer service.

SPECIFICATIONS

WARRANTY

WEIGHT

32 lbs

SIZE

13" L x 6.5" W x 8.5" H 
Group 31 equivalent

STORAGE CAPACITY

100 ampere hours (Ah). Milleretch Lithium batteries provide dependable, consistent power throughout the entire 100Ah capacity. Unlike traditional SLA batteries, Millertech Lithium LiFePO4 batteries maintain a flat voltage curve, delivering steady power output as they discharge. This design ensures you’ll enjoy uniform performance right down to the last bit of energy.

Bluetooth Capable

Yes

VOLTAGE

12.8V 

ENERGY

1280 Wh

TERMINALS

M8

LIFECYCLES (BATTERY LIFESPAN)

Up to 80% capacity for 5,000 cycles under recommended conditions—compared to just 500 cycles for typical SLA batteries. Millertech Lithium batteries offer exceptional longevity, making the cost per use only a fraction of that of traditional batteries.

OPERATING TEMPERATURE

Engineered for rugged and extreme conditions, Millertech Lithium batteries outlast SLA and other lithium options. With an optimal operating range from -20°F to +140°F (performing reliably down to -20°F), these batteries are built to handle tough environments. Note: For best results, avoid charging below 32°F.

DISCHARGE

100 A max continuous, 300 A max pulse 5 second pulse. The flat discharge voltage curve provides a 75% bigger capacity then a SLA 50Ah battery.

CHARGE

100a max, 14.4V recommended, 15V max Please note: this battery should be charged using a LiFePO4 compatible charger. A SLA charger may work, but will reduce performance and lifespan of the battery.

INCLUDES ACTIVE BMS PROTECTION

Equipped with an advanced circuit, this battery ensures cell balancing, low and high voltage cutoff, short circuit protection, and high-temperature protection. These features boost performance and significantly extend the battery's lifespan.

Unleash the Power of MillerTech Lithium

The MillerTech 12V 100Ah Group 31 Battery offers high-capacity power with Bluetooth monitoring and IP65 rating, ideal for trolling motors, backed by a 10-year warranty.

USD : 96.59