The Ionic Lithium 12V 40Ah S9 is a lightweight LiFePO4 marine starting battery delivering 1,400 cold cranking amps for engines up to 450 horsepower. It weighs 14.6 pounds (half the weight of a comparable lead-acid battery), charges five times faster, and includes Bluetooth monitoring plus an integrated battery management system with emergency start capability.
SPECIFICATIONS
WARRANTY
See manufacturer warranty
WEIGHT
14.6 lbs
SIZE
Not specified by manufacturer
STORAGE CAPACITY
40Ah. LiFePO4 chemistry provides 99% usable capacity with a flat voltage curve, meaning the battery delivers consistent power until nearly empty (unlike lead-acid batteries that offer only 50-60% usable capacity and drop voltage as they discharge).
VOLTAGE
12V
ENERGY
Not specified by manufacturer
TERMINALS
Not specified by manufacturer
LIFECYCLES (BATTERY LIFESPAN)
3,000 to 5,000 cycles (approximately 10 years depending on usage)
OPERATING TEMPERATURE
Not specified by manufacturer
DISCHARGE
1,400 cold cranking amps
CHARGE
Charges five times faster than lead-acid batteries
INCLUDES ACTIVE BMS PROTECTION
Yes. Integrated microprocessor-controlled battery management system monitors voltage, current, and internal temperature during charging and discharging. Prevents overcharging and low-temperature charging to protect battery integrity. Emergency start function reserves 25% capacity for emergency engine start (activated via Ionic app or by long-pressing the emergency start button).
BLUETOOTH CAPABLE
Yes. Connects wirelessly to smartphone for real-time battery status, charge level, and operating data.
Experience the Ionic Lithium Advantage
The 12V 40Ah S9 cuts battery weight in half while delivering 1,400 cranking amps and 10 years of service life. Bluetooth monitoring and emergency start protection mean you know your battery status before you leave the dock.
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