Frequently Bought Together
The MillerTech 12V 135Ah Dual Purpose Battery combines high energy density with exceptional versatility, featuring 1500 CCA and 135Ah of deep cycle storage. This battery is built to handle both cranking and deep cycle needs, with Bluetooth connectivity for convenient monitoring and low-temp charging protection for reliable performance in colder conditions. Ideal for powering high-demand applications, it’s fully compatible with Mercury 4-stroke engines up to 250 hp, proven reliable by MillerTech customers since 2016. Built to exceed all charging and cranking requirements, this battery is designed to support your adventures on the water and beyond.
SPECIFICATIONS
WARRANTY
WEIGHT
33 lbs
SIZE
13” x 6.75” x 9”
Group 31 equivalent
STORAGE CAPACITY
135 ampere hours (Ah). Milleretch Lithium batteries provide dependable, consistent power throughout the entire 135Ah 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.
Engine Starting Power
Lithium battery equivalent to 1,500 Cold Cranking Amps (CCA) of lead acid battery engine starting power. Suitable for automotive and other applications. Marine Outboards: Please refer to your manufacturer recommendations.
Bluetooth Capable
Yes
VOLTAGE
12.8V
ENERGY
1728Wh
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
135A max continuous discharge. 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 135Ah Dual Purpose Battery offers 1500 CCA, deep cycle storage, Bluetooth monitoring, and low-temp protection, perfect for marine and high-demand use.
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