Tenergy 8.4V 4200mAh Flat NiMH Battery Pack for AirSoft Rifles, RC Car, Hobbico Electristar plane etc. Compatible with all airsoft electric guns Dimensions: height 1.9 inch; width 1.0 inch; length 6.13 inch Advanced NiMH battery technology, no battery memory effect Longer running time and easy operation than original NiCd battery pack This item is not for sale in some specific zip codes