It is quite possible your problem is in your computer or the AC adapter/charger rather than the battery. To check that out, you will need to try a different AC adapter/charger to see whether any battery charges, and then the power board inside the computer would be the next suspect if a different adapter/charger makes no difference. A local computer shop should have their own adapter/chargers and possibly even a different battery for making those tests, but then they might also expect to be the ones to sell you whatever might be needed.