Features 1、Lightweight Design: The lightweight design of lithium batteries makes them easy to carry. 7.4V 4000mAh lipo battery provides a perfect combination of weight, power, and performance. 2、Protection Function: 7.4V 4000mAh 8C lipo battery has overcharging protection and short circuit protection to ensure the safety of the charging process. 3、Provide Long Battery Life: 7.4V 4000mAh 8C lipo battery can provide longer battery life and fully experience the fun brought by toys. 4、Wide Application: 2S 7.4V 4000mAh 8C lipo battery is suitable for outdoor playing, safe in normal use, good choice for your rc mode. 5、Great Durability: The 7.4V 4000mAh lithium battery casing is durable, sturdy and stable, and has a long service life. Item Type: 2S 7.4V 4000mAh 8C Lipo Battery Material: Lithium Polymer Weight: Approx. 117g / 4.1oz Battery Capacity: 4000mAh Lithium Battery (Shipped With Pure Battery) Voltage: 7.4V Package List 1 x Battery