Laptop won't power on unless i plug in AC power

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I had to do this:

  1. Remove the CMOS battery.
  2. Unplug the laptop battery and wait for 60 seconds.
  3. Reinstall the CMOS battery.
  4. Plug the laptop battery back in.
  5. Attach AC power and let it charge overnight.

This sort of resets everything and gives the rechargeable CMOS battery time to get back up to 3+ volts. The whole problem here was that if the CMOS battery voltage drops low enough, it won’t recharge, regardless of the laptop’s battery level and/or AC adapter being plugged in. Why they don’t just use a standard CR2032 CMOS battery, I don’t know…

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