LALELA LITHIUM BATTERY 12V 50AH@0.2C 2000 CYCLES @ 0.2C CHARGING/DISCHARGING ,UNTIL 70% CAPACITY WATER/DUST RESISTANCE IP55. SERIES OR PARALLEL CONNECTION, SIZE L223*W150*H178MM WEIGHT ~APPROX. 5.5KG 1 YEAR WARRANTY. SUITABLE FOR: INVERTERS AND INVERTER TROLLEYS.