Tenergy Airsoft Battery 8.4V 1600mAh NiMH Flat Battery Pack with Mini Tamiya Connector for Airsoft Guns MP5, Scar, M249, M240B, M60, G36, M14, RPK, PKM&nbsp;(Optional Charger) THE IDEALAIRSOFT GUN BATTERY- Fits popular models of airsoft guns like: M4, G36C, M4A1-RIS, M4A1, CAR15, MP5A5, MC51, FNP90, AUGRT, AUGM, G3A4, G36 and STEYR and others. For upgraded and/or modified AEGs, we recommend measuring the gun compartment for best fit. TRUSTED PERFORMANCE - The Tenergy8.4V NiMH battery packfeatures rapid charge up, with high capacity rating of 1600mAh that provide more playtime for your airsoft rifles. ADVANCED PROTECTIONS - Thesmart battery chargerincludes reverse polarity protection, short circuit protection, and over-charge protection. (Note: This charger is only for recharge for NiMH batteries, do no charge for LiPo batteries.) HOBBY BATTERY CHARGER- TenergyNiMH battery pack charger is great for most popular airsoft guns and RC hobbies batteries because ithas a standard size Tamiya connector and a standard to mini Tamiya adapter. Works great for any 8.4V or 9.6V NiMH battery packs in airsoft, RC cars/airplanes that use a standard or mini Tamiya connecter. COMPACT DIMENSIONS - Our electric airsoft guns batteryis designed from 2/3A NiMH battery cells, airsoft replacement battery pack dimensions are 4.4" (length), 1.5" (width), 0.8"(height) that can fit most airsoft guns; The charger has standard size and mini Tamiya connector fit 8.4V-9.6V battery. Buy with confidence, your charger includes a 12-month warranty. 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.