Very often, the metal contacts between the handset and the
base get dirty. So, it might not be fully charging. Clean
them with Q-tip and a bit of WD-40. Spray the WD on the
cotton tip, and scrub the contacts.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
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wrote in message
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It's also possible that something other than the battery is
at fault,
eg, charger, phone is partially kaput and drawing excessive
current,
etc. I've bought generic cell phone batteries on Ebay for
$6 and
they worked fine.