Questions tagged [battery-charger]

Device used to recharge a drained or dead battery.

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1answer
26 views

Lithium car battery won't jump van's battery but regular jumper cables work

Twice over the past year my wife has left something on in our Honda Odyssey. Both times I've not been able to jump start the van using a NOCO 1000Amp 12-Volt lithium battery. But, both times I've been ...
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1answer
35 views

Do I need a battery maintainer, a portable jumpstarter, or a completely new 12V battery?

Hybrid vehicle has not been used for several months due to COVID-19 pandemic. Vehicle has a 3 year old 12V AGM battery. Battery is not used as a true "starter" battery; it just boots the ...
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0answers
20 views

Trying to Charge Honda Fit 2015, Car's Headlights Flash Once Charging Starts

I'm not a car person at all, so thanks in advance for any help! My wife's 2015 Honda Fit hasn't been used for months (thanks to Corona). I'm trying to use a Schumacher SC1307 6/12V Automatic Battery ...
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2answers
41 views

basics of charging a Lead Acid battery?

I want to build a poor man's portable power station. There are only two things I need to run off of it: a 240watt fan to blow up my mattress and a CPAP machine all night that is rated at 12v 3 amp. I ...
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8answers
3k views

Can one slightly charge a dead car battery with a portable battery jump kit?

The other week, my friend was trying to jump start a friend's very dead car battery with one of the portable power bank car jump starter kits. It looked something like the below: Image source If I ...
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1answer
24 views

Does battery tender need to be in enclosed area?

I have a 2009 Winnebago Access motorhome that is rarely used. I had a battery tender but it stopped charging the battery. I purchased another tender & enclosed it in a small plastic storage box. ...
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0answers
38 views

Use of 12v Solar powered 2.4watt battery charge

My car is not being used on regular basis, sometimes not for weeks/months. Can I use one of those AA 12V Solar panel 2.4 watt car battery charger to keep the car battery topped up all the time. Can I ...
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1answer
77 views

12V AGM battery charging voltage

I have the following 12V car battery: Varta Silver Dynamic AGM 595901085 (12V/95Ah/850A), and the following car: Jaguar S-Type 2.7D. In the technical cars manual it says this: So in cold winter ...
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0answers
13 views

2003 Suzuki GSXR750 drains battery and won't start

I just bought a 2003 Suzuki GSXR750 and I keep having to replace the battery on it every time I start it. It will start maybe 4 times and run, then the battery is dead. Someone please help.
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2answers
76 views

Fiat 500e 2017 charger

i just owned a Fiat 500e 2017 sport package... i wanted to make sure that the charger that come with it is the real original one and not imitative, as i saw charger with different style, how i can ...
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2answers
47 views

Car battery won't hold a charge: can one estimate how much longer it will last? Or is it best to replace it?

I have a 12V 60Ah EFB battery in a 3-year old start/stop car. The battery doesn't seem to hold a charge. Is there any way to estimate / understand how much longer it can last, or if it's best to ...
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2answers
52 views

Can you charge a car/motorcycle battery with a portable power generator?

Can you charge a car battery with a portable power generator? Say you have a lithium, not petrol, generator, something like this or this, which you can charge in the electrical socket at home. If ...
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1answer
297 views

Car battery charging: a few questions on connecting negative clips to ground (which I couldn't find anywhere)

I understand that, if charging a car battery without removing it from the car, you should attach the negative crocodile clip not to the negative of the battery but to a metal part of the car; most ...
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4answers
336 views

Shall I disconnect an EFB start/stop car battery before charging it?

I have a 64Ah EFB car battery in a 2018 Volkswagen car with start/stop technology. I have an Optimate 5 charger which supports EFB and AGM start/stop batteries:https://optimate1.com/om5ss/ I would ...
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1answer
56 views

EFB (enhanced flooded battery) I left the lights on for more than a week because of Coronavirus

I have a Renault captur 2016 vehicle with start and stop capability, the battery is EFB 70Ah 720A, I couldn't start the engine with cables connected to another standard battery of another running ...
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3answers
222 views

Car battery booster/jump starter. Are they worth considering at all?

I have a Civic which I don't drive often and mostly sits in my building's underground parking. The battery has again discharged on me. While I have jumper cables and know how to use them, I have to ...
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2answers
84 views

Charge a car battery with a solar panel that only has USB outputs

I currently have a solar panel (this one), that is able to output 24W of power at peak capacity. I would like to be able to use this solar panel to trickle charge a car battery, but the panel only ...
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2answers
64 views

Why battery charger has rated amp hours

I have gotten a car battery charger as a present which is rated at 6A max and is also labeled up to 65Ah max. I'm not understanding why there is a battery capacity indicated on the charger when the ...
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1answer
46 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
80 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
105 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
75 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
52 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
52 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
23 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
59 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
162 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
6k 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
110 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
39 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
147 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
167 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
271 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
575 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
778 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
80 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
2k 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
60 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
218 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
480 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
5k 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
1k 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
60 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
653 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
50k 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 ...
2
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1answer
943 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
436 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
52k 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 ...