Geilienergy 6V 2000mAh NiMH RX Battery Packs with Hitec Connector for RC Aircrafts and Walking Robot INCREDIBLE PERFORMANCE - With a high capacity of 2000mAh, the RC battery pack with JR connector delivers 6V of power that can also be rapidly charged so that you can return to your hobby, quickly. The long cycle life makes this an ideal hobby battery pack for better longevity. POPULAR BRAND COMPATIBILITY - The Rechargeable NiMH battery pack with Hitec connector works with most popular model planes and RC helicopters. It can be used with popular plane brands such as Hitec, Futaba, JR, etc.. This battery pack is designed for RC airplane/helicopter receivers only. EXACT SPECIFICATIONS - With measurements of 72mm (length); 50mm (height); 15mm (thickness), the Tenergy NiMH RX Pack makes for a great plane battery with Futaba connector for radio receivers. BETTER CONSTRUCTED - Made of 5 x AA NiMH rechargeable battery high quality cells, the battery pack is weld constructed to prevent damage to the cell due from heat with a 22 AWG silicone flexible wire. Choosing better than buying a new device This 6V rechargeable battery is intended for use in RC receiver. Such as airplane,walking robot,RC car Do not mix use this 6V rechargeable battery pack with any other 6Vrechargeable batteries when their plugs are different. Mis-use of the batteries could cause explosion or fire. There are many 6V battery packs with  same voltage&amp;size but with different connector. When you put the wrong plug in the device it won&#039;t work as normal,you can refer to the picture  to select it.