This is a generic, equivalent one, 100% compatible. This 7.4V 5500mAh Replacement Laptop battery is designed to compatible with Microsoft P21GU9 Surface Pro 1 1514 / Surface Pro 2 1601.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 7.4V
* Battery Capacity: 5500mAh
* 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:
P21GU9

Compatible with the following Microsoft Laptop models:
For Microsoft Surface Pro 1 1514 / Surface Pro 2 1601

Package Included:
1 x 7.4V 5500mAh Replacement P21GU9 Battery for Microsoft Surface Pro 1 1514 / Surface Pro 2 1601