2005 Kia Spectra ELECTRICAL SYSTEM PROMBLEMS , BATTERY, CH

WHILE DRIVING, TRANS. SHIFTING SLOW AND HARD
RADIO WENT OFF, ODOMETER WENT OFF , ENGINE
CUT-OFF, BATTERY APPEARS TO BE DEAD.
JUMP STARTED ENGINE FROM ANOTHER CAR,
ENGINE ON, BUT WINDOWS, AND OTHER POWER
ITEMS, STILL NOT WORKING, TRANS STILL SHIFTING, SLOW AND HARD, WHEN CAR IS TURNED
OFF, IT HAS TO BE JUMP STARTED AGAIN.

COULD THIS POSSIBLE BE BATTERY, VOLTAGE REGULATOR OR ALTERNATOR OR OTHER.

HELP MY 05 SPECTRA,,,,,,,,,,,,

THANKS..................