100% OEM accessible with the first Microsoft SURFACE PRO battery, We offer heavenly services with a one year full warranty and 30 days unconditional offer to replace the device's battery. The batteries for our Pro5 devices went through thorough tests to ensure safety and well-being before being shipped from the battery manufacturer. Normally, the battery of a device that replaces this upper limit provides something similar to or significantly longer than the first battery of this device.