@syedtoheed54846
There is no separate CMOS battery connected to the motherboard in your model laptop.
The CMOS battery function is incorporated in the main battery.
You can try to reset the BIOS by disconnecting the main battery from the motherboard (you don't have to remove the battery, just disconnect it) and then press and hold the power on button for 30 seconds and then release it.
Then reconnect the main battery, reassemble the laptop, connect the charger and check if it turns on OK
Here's a [https://www.youtube.com/watch?v=85ZXpaca-ss|video] that may help.
The battery is seen being disconnected at 2:48 minutes into the video.