battery/altenator need shop in Davis

car was running fine then recently the battery light comes on. its still good until about 3 days later. the car starts up fine with a jump. once its off the jump it'll die again like 1 min down the road. im thinking that it is an alt problem since the battery was replaced less than a yr ago. im stuck in davis without any tools so i wont b able to work on it myself. can someone recommend a place to take it to in Davis, preferably north davis.