The USB Type A Adapter allows full utilisation of the Power Bank capabilities of the Gloworm Power Pack. Plug the adapter into the Power Bank port and its ready to charge any USB chargeable device. Charge speeds will vary depending on device. Max charge power is 18W (9V/2A). The adapter can also be used in conjunction with a 3rd party wall charger but charge speeds will be slow unless the charger is USB PD.
