Tenergy&nbsp;8.4V NiMH&nbsp;Airsoft Battery&nbsp;3800mAh&nbsp;Flat&nbsp;Battery Pack&nbsp;with&nbsp;Standard&nbsp;Tamiya Connector for&nbsp;Airsoft Guns, RC Cars/Planes&nbsp;(Optional Charger) PEAK PERFORMANCE PACK - Tenergys high performance batteries provide more playtime; our 8.4V 3800mAh NiMH rechargeable battery made of 7 cells Sub C NiMH batteries. THE IDEAL AIRSOFT GUN BATTERY  Tenergy 8.4V NiMH batterydesigned to fitM16, SR16, full stock AK series, and full stock MP5 series: G&P M16A1, KNIGHTS SR16, MP5 SD5, MK5A4, G3 SD1, M16VN, CA G3 SG1, G3 A3, FAMASF1, M1A1, ASSV, PSG1 and RC cars/planes withStandard Tamiya Connector.For upgraded and/or modified AEGs, we recommend finding connector and measuring the gun compartment for best fit. FAST CHARGE & LASTING CAPACITY - Tenergy's AEG battery features rapid charge up, long runtime, and compatibility with the Tenergy 6V-12V RC battery charger. BATTERY PACK CONFIGURATION - Tenergy electric gun battery dimensions: 6.13" (length), 1.9" (width) and 1.0" (height). Weighs 15.2 oz. MINI TAMIYA CONNECTOR - The airsoft replacement battery pack with Tamiya battery pack connector, standard 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.