Questions tagged [battery-charger]

Device used to recharge a drained or dead battery.

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1answer
41 views

How to tell what type of battery this is?

I would like to know whether it's either a lead acid wet cell, lead acid gel, or AGM battery. After reading a bit I see one method is the remove the battery and give it a shake to see if it contains ...
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2answers
70 views

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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5answers
67 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
38 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
33 views

Why is my car battery charger not powering on?

I've had my car battery charger for about six months and, just recently, it won't power on. When I connect it to the battery and the mains, the orange light comes on but there is no low humming noise ...
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3answers
47 views

How can I evaluate a used automotive manual battery charger?

How can I evaluate a charger before I buy it? I don't own any kind of amp meter or electrical test devices other than a 30 year old $15 multimeter. I'm looking to buy a used, high-amperage, manual ...
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1answer
22 views

How long should I leave a 3 amp charger on my mower battery

How long do I Charge my mower battery with 3 amp charger
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2answers
54 views

Battery only charges with parallel load - why? recoverable, or replace?

As a followup to Little/no charging but alternator and battery test good, the battery is only charging when the charger has a significant load in parallel with it (e.g. turning the key to the on ...
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1answer
60 views

Battery only charged with higher than 14.7v

My battery is 12V 8AH. 2 weeks ago tomorrow of good start engine I tried to start engine but my motorcycle was scrambling to start and I found that my battery may be damaged. Maybe it is useful to ...
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5answers
2k views

Solar Charging Car Battery through Cigarette Lighter Outlet?

My vehicle's cigarette lighter outlet is limited to 10 amps output. If charging were limited to less than 10 amps, would solar panel -> charge controller -> cigarette lighter outlet work for charging ...
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1answer
55 views

12v starter battery True amps available why volts come back so fast by running engine 5 mintues?

The OEM start battery on my new van is 70AH, 120RC. I have a 12v freezer that consumes about 3amps @ 12v. It takes the freezer about 6 hours to freeze a gallon of water. My battery is not a deep ...
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1answer
34 views

Use of diode to charge in-house battery from motorhome solar system

I want to charge in-house battery (Fiat Ducato) from the motorhome solar system. I presume I can use a diode to do this? Can you please advise and what size diode would be necessary. Thank you.
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1answer
72 views

Frost on parts under hood of car

I have some questions. I recently woke up to a dead battery. It's been below zero lately so it's not surprising as it's not an every day driver. Yesterday when I opened the hood to check the battery ...
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0answers
77 views

2006 Corvette battery tender location

I have a 2006 Corvette (C6) that isn’t driven a whole lot and I want to hook up a better tender the most convenient way possible. Obviously I can hook it up directly to the battery terminals but I’ve ...
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3answers
2k views

Is my car battery charger not working?

My old car battery died because I leave it parked too long. I replaced with new battery and this time hooked a solar trickle charger to it to keep it from discharging. (it's parked in public space) ...
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2answers
130 views

Boat Alternator Charging 4 Batteries 70 Amp Draw 50 Amp Charge

This is the current situation, looking for some expert advice. Total amp draws with night time running lights + GPS + other accessories I am at about 70 amps. My alternator puts out max 50 AMPS ...
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1answer
310 views

Is it possible to charge a small auxiliary battery with the alternator?

I want to charge a small 22AH AGM auxiliary battery just to turn on some light signals. I would like this battery to be charged by the alternator while the car is running. The problem is: the battery ...
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2answers
706 views

My car battery keeps dying, what should I do?

Because I used to leave my car unused for extended periods of time (couple of weeks), the battery can't remain unused 3 days without dying. And using jumper cables everytime is difficult. I bought a ...
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2answers
74 views

Is it normal for car battery to drain this fast or is something causing this?

My i10 ever since i got it years ago had battery problems. If left for 4 days after a short trip, it discharged enough to not start again without jump starting. If long trip then expect 2 weeks. Is ...
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4answers
843 views

12V trickle charger reads 20V with multimeter?

I have a Silverline Trickle Charger that reads 'Output 12V DC - 500mA'. https://www.amazon.co.uk/Silverline-634004-Trickle-Charger-500/dp/B001C827ZA I heard the battery bubbling after a few minutes ...
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1answer
1k views

Drained battery; imminent explosion?

What would happens when if a car battery is drained of all its fluid and then hooked up to a 12v battery charger. It's a long story I did it to my car battery accidentally for about a minute. What ...
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1answer
58 views

Charging a motorcycle battery with no exposed leads

I am trying to charge this battery with this charger: However The connectors are as such: The battery is 6V, 4Ah The charger operates at 6v, 1A Without an obvious way to connect these im a bit ...
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1answer
125 views

Car battery disconnection for charging

I have read many discussions about this, but I have been unable to find a definitive answer. Many people say that it's fine to use a standard household (cheap/dumb) 12V 4A battery charger to charge a ...
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2answers
190 views

Smart charger putting out too much voltage?

Hello I bought a smart 2/4/6 amp smart charger to charge my marine and motorcycle battery. When I plug it in to charge it get up to 15.7 V is this going to wreck my batteries? I always thought ...
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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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1answer
920 views

How do I keep an idle/unused battery ready for immediate use?

I have purchased an Exide Power MF Battery 120 A/H for my home inverter. I need to use that inverter only when there is no electricity. That can happen once a month or like that. So my question is, If ...
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1answer
51 views

Electrical feed back on charger

Do chargers like the one used to charge a car battery draw power when it is still connected to the battery but not to the wall outlet? or still connected to the wall but the power is off?
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2answers
540 views

How to prepare a car for one year of storage

This is basically the opposite question to Reviving a vehicle that has been idle for a long time I'm planning to leave my 2014 Mazda 3 in undercover storage for a year, and was wondering what steps I ...
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2answers
28k views

Can I start my car while the battery is being charged?

I'm charging a flat battery with a mains charger. I'm curious if the mains charger can also be used to jump start... If it delivers enough power? The instructions make no mention of this at all, did ...
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1answer
594 views

How many miles does it take to recharge a flat battery?

Our of car has sat unused for long enough the battery was totally dead. We jumped it the other day and drove around for 30min or so, but a few days later it is too flat to start again. From this ...
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2answers
306 views

Does a Nissan Leaf necessarily have a 6.6kW capacity on-board charger if it has Quick Charge port?

Looking at a 2015 Nissan Leaf I see it has a Quick Charge port (listed as part of the Charge Package on the spec sheet). Does this mean this car also has the 6.6kW on board charger? I'm not sure if ...
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6answers
39k views

What is more cost effective: re-charging a car battery or replacing it new when it dies? [closed]

My car battery recently died and I was wondering if it is more cost effective to re-charge it or replace it with a completely brand new battery. I know car batteries are charged with the alternator ...
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3answers
116 views

Multiple Batteries Charging

I have multiple batteries off from motorcycles, and each of them has it's own charge level (12-13 Volt measured at rest). Assuming I have only one 12 Volt charger, can I charge them in parallel until ...
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4answers
531 views

How will having two batteries effect the charging system of my 2004 Honda Civic?

I want to have a 2nd battery to power a 1000w inverter (so I do not have to start the 2004 Honda Civic). How will this affect the charging system? Will both batteries be charged?
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1answer
19k views

Car battery dead for a while… now it won't charge?

So, my car battery died 4 months ago while it was unused in my garage during the summer (interior dome light left on for months). I went to jump start it this morning, ran it 20km ( 30 minutes ) to ...
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2answers
2k views

battery fully discharged, got a jump-start, but what do I do now?

My battery was fully discharged (forgot to turn off headlights for a few hours). The car wouldn't even unlock from the remote. What should I do after getting a jumpstart?
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2answers
2k views

How long should a battery take to recharge from a wall socket charger?

My battery died and I suspect the alternator. To test I need to get the car running again and so borrowed a wall socket charger. I have no idea how long I need to let the battery charge for. Would ...
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8answers
12k views

Start a dead battery car with a power/USB charger

today my car couldn't start beacuse of dead battery. The battery is not old, I simply left my dash cam attached for a few days without using the car... I'm alone at home and my car is in a difficult ...
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1answer
4k views

Battery maintainer vs trickle charger

I understand battery maintainers, like those offered under the Battery Tender® brand, are used to keep batteries charged for long term storage, and trickle chargers are.... also used to charge ...
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2answers
1k views

Is it better to hook up a Battery Maintainer for 2 months outside, or take our chances with the battery?

My wife and I are going to be out of town for 2 months, and one of our cars will be staying home and not getting much driving. We have a Black and Decker Battery Maintainer that we were considering ...
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3answers
3k views

Is charging my engine battery like this bad?

I left a 2001 V6 Honda Accord unrun for ~4 months (I don't have a license). Naturally, the battery is dead. I have heard that letting the alternator charge the battery from empty like this puts ...
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1answer
158 views

Is there any advantage to keeping the battery “topped up”?

I got an engine/cabin heater installed into my car right before winter, which was great for driving comfort this winter. One of its "side-effect" features is that it charges and keeps your battery at ...
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2answers
563 views

12V Battery change

4 weeks ago I changed a 12V battery on my Toyota Prius auto. But after being in for two weeks the battery was discharged again. I tried to recharge it, but it did not work - the charger does not start ...
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0answers
468 views

Malfunction indicator light after a charge to low battery

My battery often needs a quick charge – 3 min or so – in the morning, then the car starts all day. Today, the light went on after the quick charge and would not go off after 2 blocks so I returned ...
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4answers
36k views

Car battery won't charge above 50%

I had a problem starting my car after not driving it for two weeks. After charging the battery with a CTEK trickle charger via the cigarette lighter socket, the car started fine. I had my car battery ...
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6answers
21k views

Can I charge a 12V car battery with a 16V 1.5A adapter?

Hello it's my first time here and I will try to address the issue as best as I can. I left my keys in the ignition a few days back and hence my battery drained itself. It is a 12V maintainence-free ...
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1answer
43 views

charging battery bank with two vastly different batteries

I have a ctek D250S DC-DC charger in my vehicle charging a 12V 100Ah agm battery from solar and alternator with up to 20A. While travelling I need to charge a 12V 7.5Ah SLA battery. Conneting both in ...
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9answers
24k views

2 Volts on Car Battery

My car battery has gone completely flat after leaving my car parked up for about a month. Tried turning over the car today, and none of the lights on the dash light up. Ran a multimeter across the ...
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6answers
63k views

Is it safe to charge two batteries off of one alternator?

Right now I have a 3000 Watt invertor wired to a 100ah sealed deep cell battery that I trickle charge at night. My plan is to run #6 wire from the battery in the engine to the spare battery so the ...
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3answers
2k views

Would leaving a battery booster with only one terminal connected harm it or the battery?

I have a 2003 Mitsubishi Diamante, and I keep two battery boosters in the car "just in case". My son recently bought a car that had problems starting. He has used both my boosters on his car and ...