4
rechargeable lithium batteries that are placed horizontally and you will see
3 slots to place AA batteries vertically.
The XN-12 can also be used as a power bank. You can simply use the
USB output on the XN-12 to recharge any USB device. Simply plug your
USB cable in the USB port on the XN-12 (Backside under red cover) and
you can start charging.
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