DBOYS PEQ-2 Style Airsoft AEG Battery Case - AirsoftGoGo Keychain Included Fit for Airsoft 20mm Rail Mount Come With Sticker Compatible With Lithium Battery or NiCD/NiMH mini Type Battery (Not Included). Fit up to 11.1V 1600mAH Li-Polymer battery or standard 9.6V Mini Type Battery Pack. Dimension : 170mm x 82mm x 30mm (140mm x 69mm x 22mm) L,W,H