Chikkathoguru has no SAI stall that swaps power parts. The swap is at Ganesh Complex, above the TVS showroom, opposite Infosys. Bring the adapter with the laptop.
The brick and the pack are separate repairs
A charger is replaced when the charger failed. A battery that has swollen or stopped accepting current is a different replacement. They try to see which quit before the quote is written. A damaged screen, a bad keyboard, an SSD or a new hard disk, the fan and heat sink, and a malware clean are done for their own faults.
You are not handed both power parts
One failed part, named, is the benefit. Paid work begins once you have accepted the named part.
Call 099724 47766 and say whether the adapter lamp is dark. The services page, the Chikkathoguru repair page, and the main near page are the swap bench.