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Battery discharges when switched off overnight

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1 Answer

Cold weather battery drain

Cold temperature is discharging power from battery. There must be a temp differential between shop and outside. Regardless to where the battery is it should not discharge power that quickly you may need a new battery


Mar 04, 2015 | Cars & Trucks

1 Answer

Normal overnight disharge of battery

a battery should not discharge overnight check for drains on battery. items like lights ,vanity mirror glove box. also have battery checked ,it may be bad .

Dec 15, 2014 | Cars & Trucks

1 Answer

Why does my car battery drain overnight

After checking that there is nothing left on which could do this (you would notice) the likely causes are

- battery self discharging due to end-of-life
- fault in the alternator unit permitting discharge to earth

An auto electrician can see which very quickly

Dec 01, 2014 | Cars & Trucks

1 Answer

I have an 88 Lincoln town car and my battery discharges if I leave it off overnight.....I checked the alternator and it is good... what else could it be?

What I see here is " battery discharges if I leave it off overnight'
I assume you mean - not connected to the car and if so, you got a bad battery.
Fix it!

Sep 11, 2013 | Lincoln Town Car Cars & Trucks

2 Answers

Why does my 96 Cadillac Eldorado battery keep discharging?

First step have the battery tested, a bad cell can cause a internal drain and kill the battery, if the batt is ok then check for interior lights like visors that stay on or interior light that come on by themselves at night due to defective door switches.

Dec 27, 2012 | Cars & Trucks

1 Answer


"Killing" the battery...not quite sure what is meant by this term ?????

Do you mean, battery discharges overnight ??
A new battery is put in and as soon as you try to crank, the battery dies ???
Battery dies, as you drive the car ?????
Or ???????

Sorry, more info required befroe I can help you !

Mar 28, 2011 | 1988 Toyota Camry

1 Answer

Battery drain overnight. have had tester on it and pulled every fuse. still a 0.44 drop

Check the battery sounds like a dud.0.44 of an amp is not enough to discharge your battery overnight.

Mar 03, 2010 | 2001 BMW 5 Series

1 Answer

Our R reg Isuzu Trooper diesel 4x4 occasionaly discharges its battery overnight. It has had a new Alternator (and Starter) since the fault arose but it still does it about once a month. Any ideas?

Please check the cutout. Sometimes it does not disengage and thus keeps discharging the battery even after the vehicle has been switched off.

Jan 09, 2010 | 2000 Isuzu Trooper

1 Answer

My 2004 GMC Sierra 1500 has been losing battery charge

Try to locate the cause of the discharge current as below:-

While vehicle electrical system shutdown as for overnight storage, connect an ammeter (with suitable current capacity and sensitivity) across the main ground connection between the battery -ve terminal and vehicle chassis/frame - (-ve of the ammeter to -ve battery terminal post, +ve to vehicle frame),
Carefully disconnect the main battery ground cable from the chassis,
The ammeter will now measure the battery discharge current - a discharge current in the order of 0.5 amp or more is of concern.
If all is well, the current draw should not exceed 50- 100 mA.
Note- Do not switch on any load while ammeter is connected, as ammeter damage or overload will occur.
If an excessive discharge current is observed, remove all fuses etc to eliminate / locate cause.

Oct 14, 2009 | 2004 GMC Sierra

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