Here is my problem.
I have a 15GB 3G Ipod for a year and half now - recently the battery doesnt last more than 2 hrs. Even when I charge it overnight and do not play it till evening (when i go for a run) its already run out of power (that sux!)

So i bought a replacement, even managed to get it pryed open and replace the new battery...

NOW the battery does not even charge!
I can get my ipod to play music when it is connected to the A/C power.
But once i take the power cable out - it says NO/LOW battery charge. HEck i even tried charging for 2 days continuous - same story! its a 3.7V 850mah battery.

I thought maybe i screwed up something and tried replacing my original ipod battery - now that holds the charge and plays for 2 hrs - and has the original issue.
What gives?
Anyone have similar problems?