12V 150Ah Deep-Cycle Start Battery is a LiFePO4 parking and start battery for trucks, buses and heavy vehicles. A dual-purpose 12V battery that combines high cranking current with deep-cycle capability, so one unit can start the engine and run auxiliary loads. It provides 1.92 kWh of nominal energy at 12.8V (12V class) and weighs approximately 18 kg, replacing lead-acid units of the same group size.
Cell & BMS Technology
The battery uses grade-A prismatic LiFePO4 cells in a 4S1P configuration with a dedicated 4S, 150A BMS. Protection covers over-charge, over-discharge, over-current, short-circuit and over-temperature events, plus low-temperature charge cut-off to prevent lithium plating in cold weather. Communication is available over RS485 / UART, Bluetooth optional, and the BMS retains fault and cycle history for fleet maintenance records.
Safety & Cycle Life
LiFePO4 chemistry gives more than 6,000 cycles at 80% depth of discharge, several times the service life of lead-acid, with no gassing, no acid handling and no stratification from partial charging. The battery operates between -20C and +60C and is sealed to IP65, so it is unaffected by road spray, dust and vibration.
Charging & Alternator Compatibility
Charging is handled by the vehicle alternator or a mains charger at a recommended voltage of 14.6V and up to 100A. The 150A continuous charge rating accepts high-output alternator charging and supports recovery charging from a deeply discharged state. An optional DC-DC charger or isolation relay is available where the vehicle alternator output must be regulated for lithium charging.
Mechanical & Enclosure
The enclosure is sealed ABS shell with removable carry handles with dimensions of 330 x 175 x 220 mm. Dimensions match common Group 31 and DIN H8 trays, with adaptor plates available for other footprints. Terminals are M8 bolt terminals, matching common OEM and retrofit cable lugs.
Typical Use Cases
Used for truck and bus starting, auxiliary loads in caravans and RVs, tail-lift and refrigeration units, marine engine starting and solar installations that need occasional high-current discharge.
Customisation
Capacity, case size, terminal layout, BMS current rating, heating function, communication protocol and brand labelling can be customised for fleet and distributor programmes. Heated versions with internal heating film are available for cold-climate routes, and parallel connection kits allow two batteries to be combined for larger parking air-conditioner loads.
Every battery is capacity-tested, high-current-tested and balance-tested before shipment. Compliance target standards: UN38.3, IEC 62619, CE and RoHS. Warranty: 3 years / 5 years optional.
