After upgrading to lion my battery is no longer recognized ho do i fix his

Since i upgraded to lion i can only use my macbookpro with the plug - this computer is only 1 year old so i'd imagine  the battery has not ben fully drained.  Also my laptop has slowed down to a craw in everything!!!
PLEASE HELP

Hi...
Try here >  Troubleshooting MagSafe adapters
And here >  Resetting the System Management Controller (SMC)

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