Tenergy 9.6V NiMH Airsoft Battery 1600mAh Butterfly Battery Pack with Mini Tamiya Connector for M4, M110, SR25, M249, M240B, G36, M14, RPK, PKM, L85, AUG, G3 (Optional Charger) PEAK PERFORMANCE PACK - Tenergys high performance bb guns batteries provide more playtime; our 9.6V 1600mAh NiMH rechargeable battery made of 8 cell 2/3A NiMH batteries. THE IDEAL AIRSOFT GUN BATTERY - Fits popular models of airsoft guns like M4, Crane Stock, M110, SR25, M249, M240B G36, M14, RPK, PKM, L85, AUG, G3, G36C, M4A1-RIS, M4A1, CAR15, MP5A5, MC51, FNP90, AUGRT, AUGM, G3A4, G36, STEYR and others. For upgraded and/or modified AEGs, we recommend measuring the gun compartment for best fit. FAST CHARGE & LASTING CAPACITY - Tenergy's 9.6V 1600mAh NiMH battery features rapid charge up, long runtime, and compatibility with the Tenergy 6V-12V RC battery charger. BATTERY PACK CONFIGURATION - Airsoft rifle battery dimensions: 0.69'' (diameter) with 4.65" (length) and 0.69'' (diameter) with 4.65" (length). Weighs: 6.7 oz. MINI TAMIYA CONNECTOR - The airsoft electric guns battery with Tamiya battery pack connector, mini Tamiya female connector assembled with 16 G wire. Fully recharge your new battery pack when you first receive it. Do not over-discharge the battery, stop using it when you notice a drop in performance. Do not over-charge the battery, remove the battery from charger when you are done recharging. Heat lowers battery life, do not charge or discharge the battery when it&#039;s hot. Always let the batteries cool down to room temp before using it/charging it. Do not store the battery with low voltage, recharge after each use to avoid over-discharge. Always store the battery in a dry and cool place, never expose it to heat or direct sunlight. Recharge the battery once every 6-month, if they will be unused or stored long term. DO NOT CHARGE: if the label on your battery says: LiPO, LIPO, Li-Po, LI-PO, Li-Polymer, Li-Poly, Lithium Polymer, Li-ion, Lithium-Ion, Lithium. Caution: LiPO battery packs may often have two sets of leads/connectors - do not charge if identified as LiPO battery. Failure to follow these warnings may result in fire or personal injury. Contact our customer support team if you are unsure if your battery can be charged.