Can my laptop still work after removing battery?

[HaoJack]

Hi, I want to ask whether am I able to use my laptop with power cable only after I remove my battery(built in) from my laptop?

[Huffer · Accepted solution]

It will work but when it has an internal battery that means the internal battery also acts as the real time clock battery which keeps system time. So if you remove AC power you will reset to default time and lose BIOS settings. So unless you want to leave the laptop on 24/7 I recommend getting a new battery. 

[HaoJack]

Thank you very much! By the way, i'm curious why  everything like system clock still functioning after removing the battery from the battery removable laptop(old typed notebook)?

[Huffer]

Laptops with click in type battery has a second little battery soldered onto or otherwise connected to the motherboard. Looks like a hearing aid battery. Laptops with internal batteries generally do not have that second battery.