To replace a new battery will definitely kill you! You should be blamed as you should take the battery out when working at home to avoid over charge, though IBM claims it has battery protection tech. Now you can check the website of Radioshack as they now has a service called "battery rebuild program", I guess the price for a quality repair in Radioshack should be much cheaper than buy a new one, plus you can also ask for the warranty when you have your battery repaired. Check it out http://www.radioshack.ca/estore/default.aspx?language=EN-CA