I bought a ThinkPad SL400 about a year and a half ago that came with Windows Vista and ThinkVantage Power Manager preinstalled. I had no problems with it at that time. I upgraded to Windows 7 last week, and still had no problems with the Power Manager.
But then I decided to do a clean install of 7, and now the Power Manager reports "No battery installed" even though nothing else has changed. The battery is recognized by both the ThinkVantage Toolbox console and the Windows 7 battery tray icon. They report that it's in decent condition, with 93% of the capacity it had when it was new. The actual performance of the battery doesn't seem to have changed.
Due to the clean install, I had to re-download Power Manager from Lenovo's website; I'm using v3.3. I don't know what version I was using before. Based on Google results, I tried a number of things, including
- uninstalling/reinstalling ThinkVantage Toolbox
- uninstalling/reinstalling ThinkVantage Power Manager
- Booting up with only AC power, shutting down, pressing the power button ten times and booting up with the battery snapped back in
- changing the power plan
None of these helped. How can I get Power Manager to recognize my battery again? I like having the charge percentage/time remaining indicator in my taskbar.