Feature 1Lightweight 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. 2Protection Function: 7.4V 4000mAh 8C lipo battery has overcharging protection and short circuit protection to ensure the safety of the charging process. 3Provide Long Battery Life: 7.4V 4000mAh 8C lipo battery can provide longer battery life and fully experience the fun brought by toys. 4Wide Application: 2S 7.4V 4000mAh 8C lipo battery is suitable for outdoor playing, safe in normal use, good choice for your rc mode. 5Great 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 BatteryMaterial: Lithium PolymerWeight: Approx. 117g / 4.1ozBattery Capacity: 4000mAh Lithium Battery (Shipped With Pure Battery)Voltage: 7.4V .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Battery