Dead Battery? What a Jump Start Can and Cannot Fix

The short answer

A jump start gets a healthy vehicle with a discharged battery running again. It does not fix a battery that will not hold charge, and it does not fix a failing alternator — in that case the vehicle dies again as soon as the jump pack comes off.

Signs it is the battery

• Slow, laboring crank, then clicking.
• Interior lights dim dramatically when you turn the key.
• The car sat for days, or a door was left ajar overnight.
• The battery is more than four or five years old.

Signs it is the alternator

• The vehicle started fine yesterday and died while driving.
• Battery warning light on before it quit.
• It starts on a jump, then stalls within minutes.

Cold mornings in Ohio

Battery capacity drops sharply below freezing while the engine needs more current to turn over. A battery that was marginal in October fails on the first hard frost. That is why the first cold snap fills every roadside queue in Cincinnati.

What we do on a jump call

We connect properly, get you running, and tell you honestly whether that jump is going to hold or whether you should drive straight to a battery. We do not do engine or electrical repair — we get you moving and tell you the truth about what is next.