Batteries on both sides won't charge. The display on the nano indicates that it thinks it's being charged, and the power switch is on, but nothing happens.
At first I thought the problem was the knock-off batteries I bought, so I ordered the proper ones from AliExpress that typeractive recommended, and they took a while to ship so I only just got them a week ago. But they both have the same problem! So the problem can't be the batteries, but is board related. Everything looks soldered properly, so I do know what to try next. Someone suggested that the charging circuits might be shorted, but how would that have happened to BOTH boards?