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Questions tagged [battery]

A rechargeable device most often made of lead plates covered in an electrolyte and protected by a plastic shell which supplies consistent electrical energy to a motor vehicle. Often referred to as an SLI battery (starting, lighting, ignition). Powers starter motor, lights, and ignition systems of a motor vehicle.

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2answers
15 views

Does car need to be driven rather than idle to ensure battery recharged?

My car is inactive for months at a time. I started it up and just left it running idle for 30 minutes. Would that be sufficient to recharge the battery or does it need to actually be running at ...
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22 views

How long can I run car accessories for before my battery goes flat?

I have a Hyundai i10 1 litre 2015 model. The battery it uses is 52ah and 12V. Given the scenario that the car battery is sufficiently charged after a long drive, the engine is off and I have the ...
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23 views

Any benefits of a relay over a dead mans switch between two 12V batteries apart from preventing discharge of starter while car is off?

I am fitting a second "leisure" battery in my car. It will be a 12V 115-150Ah AGM lead acid battery for use when the engine isn't running with loads up to 500W, generously, in practice It will be 250W ...
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2answers
43 views

Car Battery Loses Connection During Cold Weather

Background: I've been having an issue with my car recently where the battery will "die" when I attempt to start my car the morning after an extremely cold night (<32 F). I drive a 2013 Hyundai ...
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3answers
51 views
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1answer
77 views

Do you need to put grease on car battery?

Some cars have grease on the battery terminas and some don't. I have just replaced a battery. Is it needed? Why? Can I just go without? Also I want to clean the top part of my terminals with baking ...
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2answers
37 views

Charging Battery Pack with alternator

I'm thinking of making a car battery with 3.7 V Li-Ion batteries arranged in 4s configuration (14.8 V). Would an alternator that produces 13-14 Vdc be able to charge the battery pack at all? Thanks
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1answer
39 views

Toyota Matrix 2012 – Can I assume a running alternator must supply perfect electricity even if the battery is dead?

I have a 2012 Toyota Matrix. It is very similar to Corolla. The car struggles to start, and my first guess is to simply replace the battery. However, when the car starts (means car alternator ...
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0answers
14 views

Dodge caliber 08 battery light

My car battery light came on, so I replaced the battery and the alternator. This fixed my jumping and stuff, but now my battery light came on while driving in the rain. I always have problems when ...
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1answer
48 views

voltage starts at 14 every morning but then drops below 12 shortly after driving

Just bought a 1998 Nissan Frontier. It has a new alternator. For a while I was getting shorts at the terminal connectors so I replaced both. That seemed to fix the short but then I started having ...
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1answer
71 views

Exide battery manufacture date [duplicate]

I can't understand the date of manufacturing of an Exide battery EC440. The code is 8AE12-1 but I can't find this kind of code in the Exide table. Can anyone please help me? Thanks
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5answers
1k views

How does a manufacturer determine the warranty for the battery?

I was looking at replacement batteries for my car (Honda Insight). The dealership was selling a battery that had a 100 month limited warranty. The next highest warranteed battery from Autozone, ...
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1answer
88 views

Is it bad to rev the engine on a hybrid car / What will happen?

I was wondering, is it bad to rev the engine on a hybrid car? Also what would happen if I did rev the engine. Would the battery be used or would the gasoline engine start.
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1answer
57 views

What is this liquid/anything to be concerned about?

As you can see there is a cable with some syrup coloured gunge or whatever on it, on close inspection it actually looks like it’s coming out of the wire. The cable itself I think goes from the fuse ...
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1answer
44 views

Help diagnosing start up/battery drain problem

Ii previously asked this question New batteries keep getting drained, any ideas of cause? Sorry was not sure how to link question. Anyway I got a multimeter and here are my findings. Firstly the ...
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1answer
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2016 chevy malibu battery

I have a 2016 chevy malibu i tried to start my car last tuesday it would not start light radio everything came on. got a jump it started 6 days later same issue it says in the dash service battery ...
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2answers
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Is there a way for the dealership to revive a dying battery?

Long story short, 2 years ago, my wife brought her car in for normal servicing to the dealership. They told her the battery needed to be replaced. She said she didn't want them to replace the ...
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1answer
233 views

Should I replace the battery terminal clamp if some material is missing?

I recently had my battery fail on me and need to get a new one. While I was removing the battery terminal clamps I noticed there was a lot of corrosion. After I cleaned off the corrosion, I also ...
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2answers
76 views

Disconnecting a battery on a modern cars causes all sorts of problems?

I have read that disconnecting a battery causes all sorts of serious problems on a modern car. https://dannysengineportal.com/car-battery/ a) Is this article only talking about when the engine is ...
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1answer
39 views

Do you need to disconnect battery on older cars when not using car for prolonged time?

I read that you should disconnect a car batteries negative cable if not using a car for extended periods as this could lead to electrical devices draining the battery especially in new cars with a lot ...
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2answers
118 views

New batteries keep getting drained, any ideas of cause?

hyundai coupe 2.0 2006. Battery was fine for few years until it died few months ago. Replaced battery and it died within a month. Replaced that battery with same brand and it died within 2 weeks. ...
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2answers
62 views

Trying to Figure all this out before I spend a lot of money

I have a 2008 VW Jetta 2.5L Automatic , Recently the battery was dead and my car would not start. I charged it up and got it to turn over and let it run for about 15 min on its own. and everything ...
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1answer
97 views

Why does my van battery have three terminals, and how can I replace it?

The battery in our (converted) 1991 GMC G2500 Vandura has a battery with three terminals, which I believe is now dead (reads half a volt with multimeter). I'm guessing the second positive terminal is ...
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1answer
94 views

Connected battery the wrong way, what should I do?

I connected the battery the wrong way on an old Toyota MR2 turbo. The interior lights stopped working, otherwise the car starts and seem to work, exterior lights work. How do I repair the interior ...
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2answers
43 views

Using li-ion battery on motorcycle with existing minimum current draw

I own a Ducati 848 motorcycle which is well known for needing battery tender. Most of the owners of such bikes (along with their bigger brothers 1098) especially since they are not riding them every ...
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1answer
58 views

Don't understand battery test results

My battery tested at 660A. Its CCA rating is 760A. Its 100 deg temp here. Shouldn't a good battery read much higher than 760 CCA at this temperature? Or is the test equipment compensated for ambient ...
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2answers
379 views

Battery or what?

A few years back I picked up a 1989 Harley Davidson Sportster. I t was originally an 883, then the previous owner put in a 1200 cc motor. He threw a rod, so he said and had to have the cylinders bored ...
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0answers
15 views

Battery light is on causing problems with audio system

I have a 2004 mustang GT with the 4.6L N/A V8 and I am having some troubles. My car had some issues about a month ago. And I had to replace the intake manifold the alternator the water pump and the ...
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0answers
49 views

Is 15 Volts too high of a voltage to run on automotive electrical systems?

Is 15 Volts too high of a voltage to run on automotive electrical systems? And if so, would filtering the current thru an old style voltage regulator work to lower it to an acceptable voltage ???
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5answers
81 views

Is a battery charger worth it?

I have a parasitic drain on my car battery. I have a fairly old Ford Fiesta brought from a second hand garage a year ago. It has a new battery. I went to one garage who did a diagnostic test and said ...
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1answer
70 views

Do I need to replace my batttery or will it recharge by driving?

My question is different. That question is asking about how long to start the car, I’m faking about how long it should stay on after it’s started because it keeps shutting down again. I put a new ...
2
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1answer
45 views

Hot battery, just sitting

I pulled the battery as it was acting funny, thinking terminal resistance was the problem. Even though it showed 12.5 volts sitting there, under any load it went down to 8, so had a dead cell or two ...
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1answer
27 views

Delco 79PG 840CCA has a date of P107R. What does that translate to in dates? [duplicate]

I can not figure the date of manufacture on this battery. Please help!!! Thank you in advance.
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0answers
29 views

Battery Corrosion Buildup on Positive Terminal

Earlier today when I went to move my car, as I attempted to crank it over all the dash lights went out and didnt return. This has happened 3 times - this being the 3rd - since I've owned the car - I'...
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0answers
21 views

How do I set the upper cutoff voltage for a car alternator charging the car battery?

With sustainability in mind, and trying to do something new, I am looking forward to charge my car battery using Solar Power, without making much changes to my car's electrical system. Basically I ...
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0answers
25 views

Nissan Juke 2017 plate … battery

My father-in-law was looking after my 17 plate juke while I’m travelling, he let battery die . He recharged battery but now ignition won’t turn off and car will not lock
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0answers
39 views

Car won’t start without a jump, and then shuts off when I touch the brake

2010 Sukuki won’t start unless I jump it, and when I put my foot on the brake it shuts off and will not start again. Turn signals and lights come on and the door buzzer buzzes.
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3answers
104 views

Car battery at 11.8v in the morning and 12.5v after 20 minute drive bad?

If my group 48/H6 70AH 120RC Led Acid car battery is at 11.8v in the morning and 12.5v after a 20 minute drive is it bad? My van and battery are only 10 months old but I do frequently use the battery ...
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1answer
71 views

Emergency flashers drain the battery in 5-10 minutes

I have a 5yo Honda CRV. Recently I had two episodes when the car did not start after it was left with emergency flashers (hazard lights) on for 5-10(?) minutes. I had to ask someone to jump-start it (...
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0answers
18 views

Battery status indicator confusion?

I got 45 ah battery in my car full charged 12.6v and has GREEN colour on the too indicator. It was left unused recently for 2 days, and next day, I checked the battery which gives 12.4v, however, the ...
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1answer
35 views

Battery voltage confusion?

My car battery 45ah before engine start gives 12.6 Vol which means it is fully charged. Now, engine crank and the multimeter reading shows 14.4 v and continue to stay which simply implies that ...
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2answers
27 views

battery cca that is greater than what the vehicle specs require

Will long term use of a battery with cca greater than what the oem specifies damage the electrical system because of exposure to the excessive amperage?
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5answers
65 views

What can cause a complete battery drain while plugged into charger?

I own an Aston Martin Vantage V8 stationed at Mallorca, which I use when on vacation. Last year, the car had a new high quality battery replacement. The car is plugged into a charger when parked in ...
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1answer
40 views

What's this fibrous box enclosing my battery?

I have a 2015 Golf whose battery needed replacement. I noticed that the battery tray was designed to accommodate three different lengths of battery, with the factory battery being the shortest (and ...
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0answers
22 views

Sudden battery voltage drop when ignition is on

I'm currently trying to figure out what is wrong with the car, but I'm not sure if a rogue drain somewhere is able to give such symptoms or did the battery just die. The voltage of battery stays at ...
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0answers
10 views

2002 PT Cruiser is running hot

P0601 and P1684 are showing up and my car will start running hot maybe 5 mintues after I start going down the road. Help please!
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1answer
37 views

Can I charge a 12V 71Ah Car Battery with a 12V 12Ah - 48Ah Charger?

Can I charge a 12V 71Ah Car Battery with a 12V 12Ah - 48Ah Charger? When I try the charger says the battery is full, but the charge indicator on the battery says empty.
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1answer
43 views

New battery dead after 48 hours

My 3 yr old battery went dead and would not jump off. Replaced it. After 48 hours it was dead. Jumped it off. Held charge another 10 hrs. Dead again. Took to a shop. They replaced the negative cable ...
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0answers
24 views

Led strip flickering?

Connected a pair of led strips 12 v from car 12 v battery. It starts flickering when engine running, and gradually goes to constant brightness as rpm goes high. However, the light stays constant or ...
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0answers
34 views

Car is dead, but battery is (apparently) fully charged?

My car seems to be completely dead (no dash/radio/lights/ignition/key remote lock) but after testing with a battery charged apparently the battery is completely full. I've tested while connecting to ...