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

[junaruga]

@Sumit

Wow… 190 message long thread with not a single official response.

Here is one official response that I know. There are multiple threads about this topic.

Viability of an ML 1220 rechargable battery for RTC | CMOS (11th gen)

Hi all, just providing more detail on this. The RTC battery (CMOS battery) powers the very low power subsystem that preserves the real time clock (responsible for providing the calendar clock to the system) and some processor state. This battery exists to allow system time to be preserved while the main battery is in ship mode, disconnected, or drained. The RTC battery recharges when the laptop is plugged into power. Normally, when the RTC battery drains below the voltage threshold needed to…