What Happens If You Leave Your Laptop Charging Overnight. There is no problem in running your laptop 247. Theres no way to overcharge these batteries.

Charge a new laptop computer for at least 24 hours before using it. Those high temperatures are as we have clearly seen not good for your batteries internals. Or some chicken wire and 3 bits of wood Reports.
Or is it safe to leave.
While I leave my phone charging overnight I never left my laptop charging overnight because I know it does not take 8 hours to charge it espcially when it is turned off. The low voltage of trickle charge means its generated heat is negligible. Sleep Idle 24 hours or more. The first thing you have to know is that laptops have a lithium-ion battery which is not overcharged when fully charged as the energy will no longer circulate there it will only charge directly to the computer of course we are referring to modern computers.
