Hello, so, I found a not-very-new-but-original BL-5J battery. It solved the not-booting-on-charger problem I had before, but it created a much more minor one:
When I plug in a charger, ANY batterymeter shows the same percentage as it was before plugging the charger in UNTIL the battery charges completely, when everything goes back to normal. Is this solvable?
P.S. can you use a BL-4U battery from a Nokia 500 in the N900?