Specifications- 9.6V NiMH 1500mAh Butterfly/Nun Chuck Style Mini Battery Pack * High powered for longer battery life and increased discharge rate * Work with A&K, Echo 1, JG, Tokyo Marui, Classic Army, VFC, ICS, G&G, and G&P M4/ M16 /AK / AK47 * Rapidly charge up and long cycle life * Compatible: All Mini Connector Type AEG / M4, M16, G36C, AK, CQB, RIS Crane Stock type