Identify the charging connector
Check the connection at both ends of the cable.
Read the device-side connection
USB can describe the power source while the other end uses proprietary contacts. Identify the model and the exact cable supplied. Two magnetic cables can look alike while using different contacts.
Check what is included
A cable in the box does not imply a wall adapter is included. Use only the power source and cable the manufacturer specifies. Keep the manual or a note of the part number with the device.
Troubleshoot before replacing parts
Follow the manual to check alignment, power source and charge indicators. Dry contacts as directed before charging. Stop and consult the maker if the cable is damaged or the device becomes unusually hot.