7.4v 1200mAh Red Tiger Battery (LiPo). A very small stick long size battery.Your choice of plug type: standard mini-Tamiya or T-Plug (Deans) - use drop-down menu to select option. If you're not sure which plug type to use, get the mini-Tamiya, which is the standard for all airsoft guns. The T-Plug is a custom configuration for advanced users only. Uses standard Lipo balance charger connection for charging. This a solid battery that will give you a ton of power and voltage for your gun.See Technical Specs Tab for warnings and charging information. Requires LiPo specific charger.