1The battery is made of lithium polymer, which has high energy density and light weight. 2LiPo batteries have high discharge rates and it can provide power to electric remote-controlled models that need high consumption of energy. 3Compared with traditional batteries, Lipo batteries have very stable current/voltage output and more stable performance. 4Large capacity provides longer playing time for your model toy. 5Nice accessory for RC model car, airplane, boat, robot and industrial lighting.Features:1. The battery is made of lithium polymer, which has high energy density and light weight.2. LiPo batteries have high discharge rates and it can provide power to electric remote-controlled models that need high consumption of energy.3. Compared with traditional batteries, Lipo batteries have very stable current/voltage output and more stable performance.4. Large capacity provides longer playing time for your model toy.5. Nice accessory for RC model car, airplane, boat, robot and industrial lighting.Specification:Item Type: Lithium BatteryVoltage: 7.4V (2S)Capacity: 4200mAhDischarge Rate: 25CSize: Approx. 17 * 44 * 135mm/0.7 * 1.7 * 5.3inWeight: Approx. 221gPackage List:1 * Lithium BatteryNote:1. It is strictly prohibited to overcharge or over discharge, especially high-current overcharge or over discharge, otherwise the battery may be damaged by gas expansion;2. It is strictly prohibited to store the battery with full power or no power for a long time, otherwise the battery may be damaged by gas expansion;3. Do not exceed the discharge capacity of the battery, otherwise the battery may overheat and damage;4. It is strictly prohibited to use batteries with inconsistent capacity, voltage, internal resistance, size, material and brand in series or in parallel inductors at will, otherwise it may damage the battery or cause danger;5. Do not throw or smash the battery, otherwise it may be damaged or even cause short-circuit fire;6. It is strictly prohibited to puncture the battery with sharp objects under any circumstances, otherwise the battery will be scrapped immediately and corrosion;7. It is strictly prohibited to directly short circuit the external circuit of the battery, otherwise it will generate sparks and damage the battery;8. Do not put the battery near the heat source, otherwise the battery may be damaged by long time high temperature;9. Do not let children play with the battery, otherwise it may damage the battery or cause personal injury.10. Do not put the battery into the water for a long time, or it will be scrapped;11. Disassembling and dissecting batteries without permission is strictly prohibited, otherwise battery may be damaged or personal injury may be caused.