Perfine LG G4 [6000mAh] Extended Battery with 2 Cover Cases(Black-White) | G4/BL-51YF Battery Replacement for H810(at&T),H811(T-Mobile),H812,H815,VS986(Verizon),LS991(Sprint) SPECIFICATION: Voltage:3.85V,Capacity:6000mAh,2.0 X as the standard battery.Rechargeable Li-lon extended battery with 2 back cover case.Support quick charged,efficient charging. COMPATIBILITY: Fully compatible with LG G4 H810(AT&T),H811(T-Mobile),H812, H815,VS986(Verizon),LS991(Sprint),US991. SAFETY: Grade A+ battery cells,CE ,FCC and ROHS certified, built-in IC chip protect your battery from over-charging, over-heating and short-circuit with up to 500 charge cycles. ASSEMBLY: After turning off your device, just remove the back cover of your smart phone along with your current battery.Simply pop in the Extended Battery and replace your existing back cover with our specifically-made cover case. OBTAINMENT: 1x Pefine lg g4 extended battery,2 x cover case(black-white),1x user manual,180-days warranty,and the 24-hours reply costomer service by Perfine.