How do I find a parasitic draw that's draining my car battery overnight?
A parasitic draw is an electrical component staying on after the car is off, slowly draining the battery. To find it, disconnect…
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Batteries
Practical, step-by-step fixes for batteries problems — 57 published so far.
How do I fix a cordless drill battery that won't hold a charge after sitting unused for months?
A cordless drill battery that won't hold a charge after months of storage likely has deeply discharged cells that the built-in protection…
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How do I tell if my car battery is dead or if it's the alternator?
Jump-start the car. If it starts and then dies a few minutes later, the alternator is the problem — the battery was…
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How to find what's draining my car battery overnight with a multimeter?
To find a parasitic drain, disconnect the negative battery cable, set your multimeter to DC amps (200mA or 10A range), and connect…
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How to fix Android battery drain caused by Google Play services?
Google Play services often drains Android batteries when its cache is corrupted or background sync loops; clear the app cache and data,…
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How to tell if a battery is dead or the alternator is the problem
Start the car; if it cranks slowly or clicks, the battery is likely weak. If it starts but dies soon after, the…
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How to test a battery with a multimeter
To test a battery with a multimeter, set it to DC voltage, touch the red probe to the positive terminal and black…
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Why does my car battery die after sitting for two days?
A car battery that dies after 48 hours usually has a parasitic draw — something like a glovebox light, aftermarket alarm, or…
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Why does my car battery die overnight when the car is off and nothing is plugged in?
A parasitic drain from a module that fails to sleep — like a faulty infotainment system, glove-box light, or aftermarket alarm —…
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Why does my car battery die overnight when the car is off?
A car battery that dies overnight usually has a parasitic draw from a module that isn't sleeping, a faulty alternator diode, or…
See the fixWhy does my car battery drain overnight with nothing plugged in?
A car battery that drains overnight with nothing plugged in usually has a parasitic draw from a module that isn't sleeping, a…
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Why does my car battery keep dying overnight after installing a dash cam?
A dash cam wired to constant power draws current even when parked, draining the battery overnight. Use a hardwire kit with voltage…
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