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Olivia SellersJul 27, 2025
What to do if external USB device cannot be charged using the USB port on Bosch GAA12V-21 Adapter?
- NNathaniel SmithJul 27, 2025
If your external USB device isn't charging, first ensure the battery pack is charged. Then, connect the charging cable of the external USB device to the USB port on the portable power adapter and activate the adapter by pressing the “USB ON” button. Also, verify that your device requires no more than 5 V DC, 2.1 amp maximum output, as compatibility issues may exist.