LG G4 Battery Case, ZeroLemon LG G4 8500mAh TriCell Extended Battery + Soft TPU Full Edge Protection Case (Compatible with All LG G4 variants) (4897010519648) The world's highest capacity LG G4 battery @ 8500Mah. More than 2.75 times the original capacity & Slimmer than other manufacturer's extended batteries Compatible with all LG G4 models. Largest capacity battery in the world guarantee Patented design- patent #: US D700,39 s - the original innovator of the world's largest tricell extended battery 180 days zero lemon guarantee warranty with amazon 30 days full refund guarantee; longest warranty period in market; 24 hours / 7 days a week support; 100% zero defect guarantee