Welcome to OUWEE
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 laptop's original battery.

1.Battery Type: Rechargeable Li-ion Battery
2.Model: C21N1818-1
3.Voltage: 7.7V
4.Capatity: 37Wh 4850mAh
5.Connector: Please refer to the picture and check it.
6.Certificate: CE,RoHS,FCC，100% New from Manufacturer, Grade A Cell
7.Worry-Free Warranty:
At OUWEE, we believe in our battery. That's why we back them all with an 12-month warranty and provide friendly customer service, easy-to-reach support.

8.Replacement for Part Number:
C21N1818-1 0B200-03190800 M929-03KF

9.Compatible Models (use "Ctrl+F to find your model quickly")
Fit for ASUS VivoBook 15 F512FA F512DA-SH31 X512FA X512FB X512FL X512FJ X512DA X512UF-BQ135T X512FA-BQ064T X512FL-EJ205 Series Notebook

Not all models are listed,please check the part number of your original battery.

10.Package included:
1X C21N1818-1 Battery.

11.For Optimal Use battery:
①Discharge the new battery to 5% (not 0%), then charge and cycle 3-4 times to wake up the new battery.
②The important point is to perform a full discharge charge every other month to extend battery life.
③Don't connect adapter for a long time while using the battery. It may damage the battery.
④Avoid artificial shocks, disassembly, crush or puncture. Do not dispose of in fire or water.
⑤Avoid using the battery in an environment where the temperature is too high or too low.