Very few powerbanks actually deliver the rated current at a stable 5 volts.drgeoff wrote: ↑Mon Sep 17, 2018 5:40 pmYes but as there are more types and sizes of "rechargeable batteries" commonly available than you have fingers and toes that "yes" may not be much use to you.
Also note that there is currently no cell chemistry which can provide a battery giving 5 volts for a significant portion of its discharge cycle. You need to think about a dc-dc converter between the battery and the RPi.
The easiest solution is an adequately high capacity USB power bank.
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