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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10
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4answers
16k views

Can I safely upgrade to an AGM battery?

AGM batteries are capable of being charged at a faster rate, and may draw additional amperage from the alternator if it is not regulated. Many cars that come with AGM batteries have special charge ...
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2answers
757 views

Battery issues - Honda Accord 2009

I have a brand new battery and alternator my car runs fine. When I am idling in traffic the battery light flashes on and off and on. It eventually goes out when I pick up speed. I had Honda do ...
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193 views

Opel astra H 1.6 16v 2006 battery and check engine light

I have an Astra H 2006 1.6 16V, and battery light and "check engine light" came on so I took it to the mechanic (in Sweden). They said it was an alternator problem (which I also thought to be the ...
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1answer
42 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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5answers
59 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
14 views

Assessing battery condition on an EV

I'm considering the purchase of a used EV (electric vehicle, with no backup internal combustion engine). From what I understand, the battery condition of an EV, and therefore its maximum range ...
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2answers
2k views

How can I tell if a car battery that went completely flat is permanently damaged?

I've had a lot of electrical problems with my car, and a couple of times, the car battery voltage got drained absurdly low (like below 2V) for short periods of time. I gather that fast charging ...
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1answer
20 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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2answers
369 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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3answers
6k views

Renault Modus wont start

The car is a Renault Modus 1.4 16v Dynamique 5dr 2005. The symptoms are: Car wouldn't start last week. The car cranks but does not start. Push started the car in 2nd, engine starts. Took The car ...
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0answers
13 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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1answer
37 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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0answers
45 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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7answers
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How slow ( not zero) can a car engine run without hurting engine and saving on fuel

New cars have stop-start system (even though this has been available for a long time). My question is: why are car companies emphasizing shutting the engine down at a traffic light, rather than making ...
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1answer
52 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 ...
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1answer
80 views

What is this sounds? Car won't start

I've been having trouble with this car and keeping the battery charged. It's winter and the car doesn't get driven, lately I've decided to run it a bit every night. Tonight my wife tried to start it ...
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1answer
16 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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2answers
1k views

Electrical problem 2001 VW Golf: intermittent battery failure?

(This is my first question here so let me know if it is off-topic or not enough info provided, or otherwise inappropriate for the forum and I will delete it) I have a 2001 VW Golf which has started ...
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3answers
60 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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4answers
37 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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0answers
23 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
36 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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0answers
22 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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6answers
25k views

Adding a additional battery to car

I have purchased a brand new Toyota Innova. I need to install a a mac mini, 2 laptops and make this car a mobile office. I need to know if I can install another car battery in parallel, and will ...
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2answers
5k views
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1answer
52 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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1answer
162 views

charge SLA battery while using it

I will add a small auxilary battery (lead acid 12V 2.4Ah) on my car for me head unit to be able to crank the engine and not turning off the system. Now, if I crank the engine while the unit is on, it ...
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1answer
30 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
58 views

Why does my car shut off when put in reverse

I have a 2014 Hyundai Elantra, that i have owned for a little over a year now. It has been very well maintained in the time that i have had it. The other day after i finished pumping my gas, i got ...
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1answer
76 views

2009 Suzuki LS650 Battery Problem/Question

I bought a new battery that had the same amp and voltage as my current battery that I was going to replace. I double checked via the website, and they confirmed it would fit my motorcycle. (Moto ...
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2answers
115 views

I accidentally hooked the negative side of the battery up firstand the wire running to the alternator started to smoke

I accidentally hooked up negotiate cable to battery first causing the wire running to the alternator to smoke. I quickly unhooked it and hooked it up positive side first. But now my car won’t stay ...
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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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2answers
4k views

Mercedes ML 430 will not start. No click, no electrical lights nothing.

After taking a nap in the parking lot at my job, the driver's seat (power seating) -- the passenger seat did work-- I had laid back could not be readjusted. After work I went home (3am closing shift). ...
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1answer
31 views

My battery is saying fully charged but will still take charge does that mean my battery is going bad

Have tested battery an it reads fully charged but when I put a battery charger on it it still takes a charge . What could be wrong
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1answer
2k views

battery light comes on mazda tribute

2001 Mazda tribute v6 with a NEW alternator. Will start from beginning to be clear. Original alternator went out 3 years ago. Was replaced with after market, this worked for 3 years, was replace ...
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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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1answer
3k views

Charging 12v car battery with 12V 2A power supply

My car battery gets dead if I don't use the car for 10 days or more. Is it possible to charge it using 12v 2A power supply of my dth set top box. ? EDIT: Just measured the voltages using DMM. Car ...
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2answers
3k views

Honda 2002 Accord re-set after battery disconnect nightmare

I want to get my radio/car alarm re-set and I now have figured out my special code, but am I permanently locked out? The farthest step that I get is to see the serial number (U XXXX and L xxxx, ), ...
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1answer
30 views

Do I need to change car-battery or retry jumping?

I didn't drive my car for months. Jump-started it once for a minor drive, but then didn't drive it again for a few weeks. All of this happened during cold winter. Now I jumped it again, with the ...
4
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1answer
217 views

Battery Draw while car is off at 3.24

I have a 2007 Saab 95 wagon... For about 6 months at random about once a month my car has been dead. After calling AAA and they told me there is a draw from the battery at apx 3.24 which is should be ...
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1answer
39 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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1answer
72 views

Building E-Bike Help

I am building an e-bike using an electric skill-saw, a car alternator, and a 20Ah battery. I have a few questions because I am new to this stuff. Should I have the motor in between the wheel and the ...
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1answer
38 views

Charging a 26AH Lithium battery with an idle 140 minute reserve AGM battery?

My truck has a large Bosch 94R800B AGM battery rated 140 minute reserve. I've had a lot of luck using this power. Unrelated, but I have a 1200 watt inverter installed on top that can power a wide ...
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2answers
533 views

JB Weld & Acid Battery Repair

Trying to repair a crack on plastic casing on a everstart 12 volt battery after trying to connect something to the right terminal that didn't fit properly. Did some research ans decided to give JB ...
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0answers
18 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
553 views

Pontiac Grand Prix won't start, horn would honk, electrical system goes crazy

Some facts: My dad has an aftermarket Remote Keyless Entry Not aware of any aftermarket theft system, does not use keyless start He's used 410 watt power inverters through the cigarette lighter but ...
6
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2answers
2k views

2003 honda accord battery light

Battery light keeps coming on and off and power steering feels like it is going out. New battery a year ago, new alternator a year ago. Replaced the accessory belt a week ago as well as the accessory ...
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4answers
65 views

Bad battery, or something more?

I have a 2005 Ford Freestyle, I’ve been doing a lot of front end work on it and had the radio on In it one day for a substantial amount of time, maybe 6 hours. Needless to say it died and later that ...