How To Disconnect Laptop Battery Without Removing. Then remove the battery from your laptop. It will not hurt the battery as there is circuitry built into the system to prevent the battery from overcharging.
Ensure that all latches and other attachment devices that hold your battery in place are released. After that take a screwdriver and remove all the screws from the back. Then remove the battery from your laptop.
If I understand the question set correctly yes your laptop can run just fine with the battery inside and the AC cord plugged in.
Then remove the battery from your laptop. Close the LCD panel. Your computer should now be turned on. Holding power button down for 5 seconds is meant to discharge power supply capacitors that will hold voltage for as long as half an hour after shutdown and supposed to.
