Bad alternator?

I just bought a new duralast gold batterie for my hellcat charger, the car has intermittent starting problems. I thought it was for sure the batterie but that did not resolve the issue, the car has a lazy crank and is very reluctant to start. Today i was sitting in it amd watched the volts drop down from 9.1 8.5 before i decided to shut it down. Things like the radio had turned off and the car was starting to display warnings .. service active dampening/ electronic stability control etc...
I also am getting a faint electric smell under the hood.
I am thinking of removing the alternator and having it rebuilt by a local shop down the street.
Any body have any input or suggestions?