Looks like there are numerous people with similar problems posting in the Palm boards.
Here is one that a Palm Tech lists various issues, but it is apparent there are many with the problem who aren't included in the tech's list of possible culprits. I used "centro battery" as the search term.
The big suspect is the Sprint email program. There is a flaw and it is recommended to use VersaMail (who thought you would see that, eh?). Many with the battery problem claim they never even set up the email though.
This seems to affect some hardware and not others. May need a firmware update....
If I find more I will let you know.
By the way, there is a sister site to ET,
EverythingCentro. You might want to take a look over there and maybe start a thread in the
forums if a search doesn't give you what you are looking for. There was at least one mention of a similar battery issue
here. Oh yes, your ET user name and password should get you in over there too.
SteveTaz