Why Does My Car Battery Keep Dying

If you're jump-starting your car every few days, something is draining the battery or it's not getting recharged properly.

A battery that keeps dying points to one of three problems: a parasitic electrical drain, a failing alternator, or a battery that can no longer hold a charge. Parasitic draws are the sneakiest — something stays powered when the car is off, slowly draining the battery overnight. Common culprits include stuck relays, aftermarket accessories wired directly to the battery, trunk lights that don't shut off, and Bluetooth or GPS modules that never sleep.

To find a parasitic drain, a mechanic connects an ammeter in series with the battery and pulls fuses one at a time to isolate the circuit that's drawing power. A healthy car should draw less than 50 milliamps with everything off. If the alternator tests fine and there's no parasitic drain, the battery itself is the problem — sulfation from repeated deep discharges can permanently reduce capacity. Short trips that don't give the alternator enough time to fully recharge the battery also contribute.

Chasing electrical drains requires patience and proper testing. Ez Mobile Mechanic specializes in this at your Jacksonville location — we bring the amp clamps and test equipment to your driveway. We're a mobile mechanic in Jacksonville who solves the root cause, not just the symptom. No tow truck needed. Call (904) 788-7272.