Treo 750 Battery problems/questions

[alleyandy]

Hi all:

I have a Treo 750, Cingular branded and unlocked by using methods on this site.

Recenty I got a car charger for it, plugged it in, and something went wrong. The charger smelled burned, so I unplugged it.

Since then, I cannot charge the battery using the Treo 750 AC wall charger. The charge light does not come on and,even if left over a day, the battery does not charge. I have 3 chargers, and the same thing happens with all of them.

I tried putting the 750 battery into my Treo 650, to see if it would charge there. It does charge, but the 650 charge light does not come on.

I tried putting the 650 battery in the 750, and it works, but it shows 0% for battery life. It does not charge in the 750 either.

I've been getting by with charging the 750 battery in the 650, and using the 650 battery while the other one charges. That has worked OK, but the 750 does not know the 650 battery state, so it will shut down with no notice!

So, does anyone have any ideas?

Should the 650 battery work and charge in the 750?

Should the 750 battery work and charge in the 650?

Does anyone have the pinouts for the 750 and/or 650 battery?

Is my 750 doomed to never charge again?

And, I'm sure I'm hoping for the impossible, but is there a fuse in the 750 charging circuit?

Thanks!