This is a generic, equivalent one, 100% compatible. This 7.7V 37Wh Replacement battery is designed to compatible with ASUS Y4200 Y5200F Series.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 7.7V
* Battery Capacity: 37Wh
* Chemistry: Li-ion
* Cell: 4 Cells
* Color: black
* recharge cycles：500
* Operation time: Around 1.5-3 hours
* Certification: CE FCC RoHS
* Condition: new, 1 Year Warranty!
* No memory effect, Over-charge protection, Over-discharge protection.
* Over-heat protection, Over-current protection, Short-circuit protection.

Compatible Part Numbers:
C21N1818, C21N1818-2, B21N1818, B21N1818-2, 0B200-03280500, C21PpJH.

Compatible with the following ASUS Laptop models:
For Asus Y4200 Y5200F Series;
For Asus VivoBook S14 S412F S412FA S412FJ S412FL S412D S412DA S412DK S412U S412UA Series;
For Asus VivoBook 14 A412 A412D A412DA A412DK A412F A412FA A412FL A412FJ A412U A412UA Series;
For Asus VivoBook 14 F412 F412D F412DA F412DK F412F F412FA F412FL F412FJ F412U F412UA Series;
For Asus VivoBook 14 R424D R424DA R424F R424FA Series;
For Asus VivoBook 14 X412 X412D X412DA X412DK X412F X412FA X412FJ X412FL X412UA X412U X412UB X412UF X412J X412JA Series.

Need Attention: There are two battery C21N1818-1 and C21N1818-2, they are not compatible with each other. Please choose which one you are going to replace and according to your laptop's original battery.

Package Included:
1 x Replacement Laptop Battery for ASUS Y4200 Y5200F Series 7.7V 37Wh