Sorry, the configuration is one 3-long string of 2 cells in parallel (not 2 parallel strings).
I dug deeper into the reviews. People say there is indeed a built-in charge balancing in the Aili powerbank.
The pairs of cells still must be closely matched, but this is true for all other powerbanks where cells are connected in parallel. I am using cells from old 3S2P laptop batteries, where cell pairs are already welded together.
?
73, Mike AF7KR
