Car Battery Overnight Drain Quiz

1. Do you have aftermarket accessories (alarm, stereo, LED lights) installed?
Yes, and I’m not sure they’re wired correctly
No

2. Are there signs of corrosion or loose battery terminals?
Yes, white/greenish crust or flaky buildup
No, connections look clean and tight

3. Is your battery more than 3–5 years old?
Yes, it’s aged or looks swollen
No, it’s relatively new

4. Have you measured parasitic (key‑off) battery draw? (>50 mA)?
Yes, it’s above 50 mA
I haven’t checked or it’s low

5. Do you frequently take short drives that don’t recharge the battery?
Yes
No, mostly long/regular trips

6. Does your car sit outdoors in extreme weather (very hot or cold)?
Yes
No, it stays in mild/garage conditions

7. Has your alternator or voltage regulator been tested?
Yes, it tested below 13.7 V or above 14.7 V
No, or it seems fine