※ Application:This battery is compatible with UMX 2S aircraft; Suitable for fixed wing drones, quadcopters, gliders. ※Parameters: Battery Voltage: 7.4V; Capacity: 400mAh;Battery configuration: 2S;Discharge rate: 30C;Dimensions: 45*20*11mm/1.77*0.79*0.44inch; Weight: 20g/0.7oz; Discharge Plug: PH-2.0 3P Plug; Charging Plug: PH-2.0 3P Plug;Battery Chemistry: Lithium Polymer. ※More power: 2PCS 400mAh AA NiMH battery rechargeable pack is ready to deliver the power for you anytime,anywhere.RC battery pack delivers a discharge rate to push your RCequipment run time to the peak of its abilities ※Battery prevention measures: 1. Turn off the device when the battery level is low to avoid deep discharge. 2. Be sure to disconnect the battery from the device when not in use. 3. If the battery is bloated, swollen, leaking, overheated or any other abnormal phenomenon, do not use or charge it. 4. Do not disassemble, puncture, impact or damage the battery. Do not ignite the battery. 5. Do not overcharge the battery. Improper use, such as short circuits or overcharging, may lead to explosions or fires. ※Package includes: 2X7.4V 400mAh Lithium battery, 1X Exquisite Packaging Box，1X User Manual. We adhere to the principle of customer first, and you can contact customer service as soon as you have any questions. 1111