I've got a Sony BC-9HP battery charger that, IIRC, I got with my MZ-E30 MiniDisc player. The charger says on it "charge only NH-9WM and NC-6WM". I lost my original NH-9WM battery when my MZ-E30 got stolen many years ago but it looks as though it was a 1200mAh battery.
Is there any reason I shou...