Does your battery show 100% when fully charged? If it does then I think you'll have to accept that it may be time for a new battery. However, if the problem is that it will not take a full charge then you can get a small program that will fix the problem.
I left my laptop on and completely ran down the battery once and when I went to recharge it, it 'stopped' around 70%. Over a couple of weeks this reduced to around 40% max charge. Following a phone call to the manufacturers tech helpline, they E-mailed a 'fix' which worked a treat! However, as I nearly always plug into the mains I can't say for certain that the 100% time is the same as it was - but it's certainly more than when it was showing 40%! (I always say in this forum that I'm no computer buff - so check with an expert, but I hope it helps)
[This message has been edited by BALOO (edited 09 June 2001).]