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 shouldn't use this charger to charge Vapex gumstick batteries that are 1450mAh?
The specs on the back of the BC-9HP say:
Input: AC220-230V 7W 50Hz
Output: DC1.2V 1.9A
Apologies if it's a daft question but I'm no electronics expert...