With 10 Nos of High Discharge 2500mAh Ce-lls Inside, 18V 4.95-5.05Ah Output Capacity (Not 4Ah), 50Amps Discharge Power Compatible With Ein-he-ll 18V Cordless Power Tools And Original Chargers; Also Compatible With HHiMXPO 18V Power Tools And Chargers; The Battery Do Not Compatible With Others Please Do Not Pull Out The Battery While Charging, Do Not Water In Rubber Covered Bottom Housing Encures Shock And Impact Protection At Work 3-LED Indicator System for Checking Charge Level At Any Time Please Run The Battery First When You Receive HHiMXPO 2Pieces 18V 5.2Ah Replacement Li-Ion Battery Compatible with Einhell 18V Lithium-Ion Cordless Power Tools for 4511496 4511437,