Mighty Max Battery 9.6V 2000mAh NiMH NUNCHUCK BATTERY REPLACES AIRSOFT AMR-4 RIS EBB AEG brand product Rapidly charge ande had a long life cycle span 9.6V 2000mAh Nun chuck Battery Pack Fits Models (but not limited too): ERICS27, ERA004, ERICS13, EROA002, EROA003, SDGE0507R, SDGE0501R, and more Airsoft Battery pack NiMH BATTERY