your panel has a rechargeable battery,its not ment to be taken apart,your lucky it did not blow up in your face,
get yourself a new battery,you where given the wrong advice,and not by any of the regulars here,the battery is marked sealed for a reason,when you ask for advice,you must give all relevant information,then we can work out what your prob may be,after you fit the new battery,you may need to reprogramme the panel,if so,come back here.
gts, January 2011