8.4V NiMH 4200 mAh Crane Stock Battery Pack for Airsoft Guns Made of 7 pcs matched high power Sub C NiMH 4200 mAh With Mini Tamiya Male connector assembled with 16 G wire Fit Models: Airsoft Marui 16 series, Airsoft Star Crane Stock Twice longer firing time than original NiCd Battery Dimensions: 5.25" (Length); 2.95" (Width); 0.87" (Thickness)