I’ve purchased a couple of USB UPS units, but I doubt either has the capacity you are looking for. The first one has only 2600mAh capacity (and has an annoying short captive USB-A to micro USB cable). The second one has a USB-A male to female cable that allows it to be used with a devices original cable, but even it only touts 3000mAh capacity.
I discussed that latest unit here:
…and the earlier unit (now used for my Blink Sync Module) here:
There are larger capacity units, but they tend to cost as much or more as the Wyze camera itself.