The WisePad 3 card reader takes 3 to 4 hours to charge fully. After the reader's fully charged, its battery should last for about 500-600 transactions. Charge the card reader daily to ensure that it's always ready to process transactions. You can check the amount of charge remaining in the card reader on the WisePad's by looking at the battery icon in the top right-hand corner of the display screen.
You can charge the WisePad 3 card reader by using the USB cable that's supplied with it. To charge the reader, plug the small end of USB connector into the card reader and then plug the large end into a phone charger or a computer.
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