You can use a power adapter with specifications of 5V/2A (if this specification is not available, you can use another 5V voltage adapter) to connect to the charging cable. If the external battery needs replacement, you can use regular batteries.
You can use a power adapter with specifications of 5V/2A (if this specification is not available, you can use another 5V voltage adapter) to connect to the charging cable. If the external battery needs replacement, you can use regular batteries.