The Millertech Lithium 12V 40Ah Dual Purpose Marine Starting and Electronics Battery handles both engine cranking and house loads in a single package. This battery delivers 600 CCA for reliable starting while providing 40Ah of usable capacity for electronics, with a 200A peak discharge capability that handles the surge current most marine applications demand.
SPECIFICATIONS
WARRANTY
See manufacturer warranty (Warranty - Millertech)
WEIGHT
14 lbs
SIZE
7.6" x 5.2" x 7.25"
STORAGE CAPACITY
40Ah
VOLTAGE
Nominal: 12.8V
Float: 13.5V
ENERGY
512Wh
TERMINALS
Torque setting: 10 ft-lbs
LIFECYCLES (BATTERY LIFESPAN)
Self discharge rate: < 4% per month
OPERATING TEMPERATURE
Charge: 28°F to 140°F
Discharge: -4°F to 140°F
DISCHARGE
Max continuous: 40A
Peak (5 seconds): 200A
Cutoff voltage: 10V (any cell 2.5V)
CCA: 600A
CHARGE
Max voltage: 14.6V
Max current: 40A
Recommended current: 5-10A
Recommended CV: 15 minutes
INCLUDES ACTIVE BMS PROTECTION
Yes. Includes active BMS protection with cell balancing, low and high voltage cutoff, short circuit protection, and high temperature protection.
Bluetooth Capable
Not specified by manufacturer
Experience the Millertech Lithium Advantage
The 1240-DP delivers dual-purpose performance at 14 pounds, replacing heavier lead-acid batteries while providing both 600 CCA starting power and 512Wh of energy storage for electronics. One battery handles what used to require two separate installations.
Secure payments powered by Shopify and PayPal. Affirm financing available on orders over $35.
Shop Reviews
