All our batteries for airsoft use are carefully designed with the specific requirements for airsoft use in mind. The battery must give a high current on demand with minimal drop in voltage, this gives fast reloading i.e high rate of fire (ROF). The battery should also have high capacity to give maximum running time - i.e. maximum shots fired. The last thing you want to worry about is the battery, you just want to charge it, install it & get on with other things! These batteries enable you to do just that.