Sealed lead-acid battery (SLA) does not require maintenance, designed for use in electric bicycles, electric carts, electric cars, toys, electric scooters, portable TV, video equipment, lifting equipment, forklifts and etc. Specifications: Number of elements: 6 Voltage: 12 V Nominal capacity: 12 A / h at 10-hour discharge to 1.75 V per element at 25 ° C Terminal type: M4 Shelf life: 7 years Maximum charging current: 3.6 A Charging voltage in buffer mode: 13.7 V ~ 13.9 V at 25 ° C Temperature compensation: -3 mV / ° C / cell Charging voltage in cyclic mode: 14.6 V ~ 14.8 V at 25 ° C Temperature compensation: -4 mV/°C/cellOperating Temperature Range: Discharge: -20°C~60°C Charge: 0°C~50°C Storage: -20°C~60°CNormal Operating Temperature Range: 25±5°CCasing Material: A.V.C. UL94-HB, UL94-V0Self-Discharge:Rechargeable Battery Gamma Regulated Lead Acid (VRLA) battery can be stored for up to 6 months at 25°C, and then recharging is recommended. The monthly self-discharge rate is less than 3% at 25°C. Please charge the batteries before use!