Mini AK Type Stick Type Battery with Large Battery Capacity Innovative 1600mAh NiMH Cell Constructed High-Drain Type means high power output for your AEG Minimum 2600rds per each full charge at Full Auto shooting mode Ready to install on ALL Airsoft AEG that accommodate AK type battery (NO MODIFICATION NEEDED) RC Magazine recommended for the best choice battery Rechargeable Battery with Mini Plug NOTE: NO DISCHARGING REQUIRED, just charge every time you play 8"x.75"