I'm trying to use a TK-350 I bought off someone on this forum but it apparently isn't charging. Do you think this is most likely the fault of the charger, the radio or the battery? The charger's status light lights up, so it appears to be working. The battery gets a bit warm so the charger is obviously transmitting current. So that basically leaves the radio and the battery. Naturally, I'm inclined to think that the battery on such an old radio is the part that's at fault but I'd like to get everyone elses opinion or possibly find another TK-350 owner in the NYC area who can take a good 5 or 10 minutes out of their day so I can borrow a battery to test this thing.