IBM Thinkpad Series I 1200 (1161). Replaced the NiMH battery with Lithium Ion. Replaced the AC cord. When I look at Power Options, it says my battery is 3% charged. Won't run on either battery. Won't charge either battery. Will run with battery in or out. Ran fine many months ago with NiMH battery. Didn't use it for many months. Now the above problems. Any suggestions?