2006 Charger the transmission seemed to only pull in low........ on 2006 Dodge Charger

and would not accellerate past 2000 RPMs we got it home running about 20mph. Now having trouble starting it (able to start with a jump) and it will run for about 10 seconds then sputters and dies.

Asked by for the 2006 Dodge Charger
2 answers
Is the alternator charging?
maybe the battery is low