Welcome to OUWEE OUWEE are mainly sold adapter, laptop and Tablet battery, power bank , etc. Before placing your order, we highly suggest you to open the back case of your latptop and check out the exact part number of your laptops original battery.1.Battery Type: Rechargeable Li-ion Battery2.Model: C21N15303.Voltage: 7.6V4.Capatity: 38Wh 5000mAh5.Connector: Please refer to the picture and check it.6.Certificate: CE,RoHS,FCC?100% New from Manufacturer, Grade A Cell7.Worry-Free Warranty: At OUWEE, we believe in our battery. Thats why we back them all with an 12-month warranty and provide friendly customer service, easy-to-reach support.8.Replacement for Part Number: C21N1530 2ICP134/59/49.Compatible Models (use Ctrl+F to find your model quickly) ASUS Chromebook C202 C202SA C202SA-2A C202SA-YS02 SeriesNot all models are listed,please check the part number of your original battery.10.Package included: 1X C21N1530 Battery.11.For Optimal Use battery: ?Discharge the new battery to 5% (not 0%), then charge and cycle 3-4 times to wake up the new battery. ?The important point is to perform a full discharge charge every other month to extend battery life. ?Dont connect adapter for a long time while using the battery. It may damage the battery. ?Avoid artificial shocks, disassembly, crush or puncture. Do not dispose of in fire or water. ?Avoid using the battery in an environment where the temperature is too high or too low.