battery won't change to 100%

[Daze]

I purchased a Palm M505 that had to be a couple years old. The battery didn't hold charge, so I purchased a new one and replaced it. Now when placed in cradle it changes the battery to 100% (so it says), but within just a few minutes of use it discharges to somewhere in the 30-40% range. I returned the battery thinking it was bad, but was told it was OK. I was also told that some M505's had a bad motherboard that prevented charging to 100%. Has anyone else heard of this? I don't want to purchase and replace the motherboard if that isn't the problem. Any help would be appreciated.
Thanks in advance.

[JohnKes]

The charge circuit needs to be reset:
http://support.handspring.com/esupport/forms/hsResolutionView.jsp?ResolutionId=7183&ResType=RESEARCH

This should solve your problem.

The new battery was brand new, right? Not "newly removed from another m505"? Li-Ion batteries last about 2 years from date of manufacture. Newly removed = about 2 years old, so that would be bad.

[acolythe]

My new Li ion battery did the same thng. Try a soft reset while in the cradle charging. This often resets it so it will accept a fuyll charge. Been fine ever since. I should add that I have a 515.
Barry