The Millertech Lithium 12V 300Ah Sports Series battery delivers 3840Wh of usable power with integrated Bluetooth monitoring and a built-in heater for cold-weather operation. This is a prismatic cell lithium battery designed for serious marine applications where consistent power and weather protection matter.
SPECIFICATIONS
WARRANTY
See manufacturer warranty
WEIGHT
62.3 lbs
SIZE
13.5" x 9.6" x 10.5"
STORAGE CAPACITY
300Ah at 12.8V nominal. Lithium batteries maintain a flat voltage curve through discharge, meaning you get consistent usable capacity until the battery is nearly empty, unlike sealed lead-acid batteries that lose voltage and performance as they drain.
VOLTAGE
12.8V nominal
14.6V max charge
10V low cut-off
ENERGY
3840Wh
TERMINALS
Pure brass terminals
LIFECYCLES (BATTERY LIFESPAN)
Not specified by manufacturer
OPERATING TEMPERATURE
-4°F to 140°F
Includes low temperature charging protection and built-in heater for cold weather operation
DISCHARGE
150A max continuous
400A peak (5 seconds)
CHARGE
150A max continuous
98% efficiency
No memory effect
INCLUDES ACTIVE BMS PROTECTION
Yes
BLUETOOTH CAPABLE
Yes, integrated Bluetooth monitoring
Experience the Millertech Lithium Advantage
The 12V 300Ah Sports Series combines 3840Wh of power with waterproof construction, dual stainless steel air vents, and an integrated carry handle. The built-in heater and low-temp charging protection make this battery suitable for year-round operation in varying climates.
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