The batteries are designed for backup power supply 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: 134 A / h at 10-hour discharge to 1.80 V per element at 25 ° C Weight: 39 kg (Tolerance ± 5.0%) Internal resistance: 4.4 mOhm Terminal type: F5 (M8) / F12 (M8) Maximum discharge current: 1340 A (5 seconds) Short-circuit current: 2480 A Shelf life: 12 years Maximum charging current: 13.4 A Test capacity: C3 103.8 AHC5 117.0 AHC10 134.0 AHC20 142.0 AH Voltage Float Charge Voltage: 13.6V~13.8V@25°C Temperature Compensation: -3mV/°C/cell Cycle Charge Voltage: 14.6V~14.8V@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 dimensions (340*173*287 mm) Please note! Failure to comply with the voltage and charge/discharge current specifications may damage the battery and void the warranty.