Can I Replace the Battery on a Xero S1

The Xero S1 has a rechargeable, built-in lithium-ion battery. The internal battery cannot be changed nor serviced.

If the device fails to charge, or power on. 

1. Try a different usb micro-cable

2. Try a different power supply (computer or usb ac charger)

If those options do not work the Xero S1 may need to be exchanged.  Garmin Outdoor Product Warranty Policy and Repair Process