The batteries are designed for backup power systems in uninterruptible power supplies, used in telecommunication systems of industrial, office and other institutions. Specifications: Number of elements: 6 Voltage: 12 V Nominal capacity: 9 A / h at a 20-hour discharge to 1.75 V per element at 25 ° C Weight: 2.555 kg (Tolerance ± 5.0%) Internal resistance: 18 mOhm Terminal type: F2 Maximum discharge current: 90 A (5 seconds) Short-circuit current 450 A Shelf life: 6-8 years Maximum charging current: 0.9 A Test capacity: C3 6.98 AHC5 7.89 AHC10 8.46 AHC20 9.06 AH Charging voltage in buffer mode: 13.7 V ~ 13.9 V at 25°C Temperature Compensation: -3mV/°C/cell Cycle Charge Voltage: 14.6V~14.8V at 25°C Temperature Compensation: -4mV/°C/cell Operating Temperature Range: Discharge: -20°C~60°C Charge: 0°C~50°C Storage: -20°C~60°C Normal Operating Temperature Range: 25±5°C Case Material: A.B.S. UL94-HB, UL94-V0C Freeze Discharge: RITAR Rechargeable Battery Regulated Lead Acid (VRLA) batteries 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. Device size: Length: 151mm Width: 65mm Height: 94mm Height with terminals: 100mm Weight: 2.30kg (Tolerance ±5.0%) Please note! Failure to comply with the voltage and charge-discharge currents may damage the battery and void the warranty.