This should work perfectly. The supplied mini-USB cable with a 5V standard USB connection fits into any power bank. However, the use of the camera during the charging process is massively restricted - cable tangle ... AND: The condition will probably be a power bank that allows sufficient charging, otherwise the camera will not accept it as a charging process (this happened to me recently with a dog tracker). - I haven't needed it myself until now, because there was always a 220 V connection nearby in time for the charger. By the way, I always use the iPhone charger. It is fully sufficient.