Dead Battery
Batteries usually last 3-5 years. Cold weather, short trips or a parasitic drain kill them earlier.
Can I drive it? Drive with care
After a jump-start, drive 20-30 minutes or have the battery and alternator tested. Do not switch off far from help.
Typical repair cost
A jump-start is free, a new battery is $120-$350, cleaning corroded terminals is $20-$100.
General US estimates, not quotes. Prices vary by region, vehicle and shop.
Symptoms to Look For
These signs indicate you might be experiencing this issue
- Engine cranks slowly or not at all
- Rapid clicking sound when turning key
- Dashboard lights dim or flicker
- Electrical accessories work but engine won't start
- Battery warning light illuminated
Potential Causes
Most likely reasons for this problem, sorted by probability
Repair Solutions
Step-by-step instructions to diagnose and fix the problem
1Jump Start Procedure
- 1
Park donor car close but not touching
- 2
Connect RED clamp to positive (+) terminal of dead battery
- 3
Connect other RED end to positive (+) of donor battery
- 4
Connect BLACK clamp to negative (-) of donor battery
- 5
Connect final BLACK clamp to bare metal engine block of dead car
- 6
Start donor car, wait 2 minutes, then start dead car
- 7
Remove cables in reverse order
2Battery Load Test & Replacement
- 1
Take battery to auto parts store for free load test
- 2
If battery fails, record CCA (Cold Cranking Amps) rating
- 3
Purchase correct replacement battery size
- 4
Disconnect negative first, then positive terminals
- 5
Remove hold-down clamp and lift out old battery
- 6
Install new battery and clean terminals with wire brush
- 7
Apply anti-corrosion spray to terminals
Need professional help?
Find a repair shop near you, or describe your exact symptoms to the AI mechanic
When to See a Mechanic
Do not wait if any of these apply
- The battery dies again within days of replacement
- The battery is under three years old
- Lights dim while driving
How to Prevent It
Simple habits that stop this problem coming back
- Test the battery every autumn
- Clean corrosion from the terminals
- Take a 30-minute drive each week if you mostly do short trips
Frequently Asked Questions
How do I know if it is the battery or the alternator?
If the car starts after a jump but dies soon after, suspect the alternator. If it runs fine but will not restart after sitting, suspect the battery or a drain.
How long does a car battery last?
Roughly 3-5 years. Hot climates shorten that.
Related Issues
AI-generated and informational only. This is not a diagnosis of your specific vehicle and does not replace inspection by a qualified technician.