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Questions tagged [battery-charger]

Device used to recharge a drained or dead battery.

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1 answer
23 views

2015 Honda Odyssey. How to charge my APU only when the car battery is not being charged?

I have a 2015 Honda Odyssey and an APU (battery) that I want to charge at 400W (on the highway). To avoid overloading the alternator, I want to charge my APU only when the car battery is not being ...
2 votes
1 answer
838 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 ...
0 votes
1 answer
30 views

12v motorcycle AGM battery

I have a pulse repair battery charger 12v and it's says it can only charge lead acid batteries, I also have an AGM battery in my motorcycle and wanted to know would the charger work on the AGM battery ...
0 votes
3 answers
106 views

Why do Level 2 home charging points use 7 kW?

As I understand it in both the UK and the US (and I assume other places) have a Level 2 car charging standard that uses 7 kW and charges a standard car in about 9.5 hours. Why was this level chosen? ...
2 votes
2 answers
64 views

car battery unused for three years

Car has been in the drive for 3 years and the battery has gone flat. I took it out of the car and opened the cell covers and the water/liquid level in all of them looks kinda low. Also a few of the ...
1 vote
1 answer
2k views

Safety around permanent trickle/float charger connection for car battery

I rarely use my second car, as a result, the battery often drains too much by the time I need it. I have a slow charge battery pack which works if I want to wait a while to get to the minimum level to ...
2 votes
5 answers
11k views

Under what circumstances should you use the Fast Charge or Trickle Charge settings on a car battery charger?

When using a modern battery charger to recharge a basic car battery that is in good condition, but is run down to the level that it is unable to turn an engine over, under what circumstances should ...
0 votes
1 answer
2k 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 ...
1 vote
4 answers
708 views

ODB connection for solar panel

Could I connect to the ODB socket to trickle charge my car battery with a solar panel on my Toyota Prius 07, and how to?
0 votes
0 answers
87 views

How should I wire my dump trailer battery?

Normally this would be a simple task, but this isn't exactly going to be a normal set up. So here's situation. I recently bought a used 14k dump trailer. The hydraulic motor for the dump trailer is ...
6 votes
2 answers
2k views

Risk of solar panel overcharging 12v battery?

I've purchased a used boat that came with the following: D18S/T3 Battery: AJC 12V 18Ah Sealed Lead Acid – AGM – VRLA Battery (photo) SunForce Solar Panel: 1.5 Watt, 12-Volt Solar Power Sports Battery ...
3 votes
1 answer
967 views

Have I fried my alternator through frequent use of an external charger?

Recently, on a longer trip, the battery light came on while I was driving, indicating the alternator was no longer charging the battery. The shop diagnosed a bad alternator and replaced it, which ...
0 votes
3 answers
2k 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 ...
7 votes
2 answers
665 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 ...
1 vote
1 answer
66 views

What's wrong with my car battery?

If I leave my car without starting for 4-5 days - the car won't start up. I have to jumpstart it (using a portable battery) Using multimeter with the car off, it reads about 12.4V Does the battery ...
0 votes
2 answers
138 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 ...
0 votes
0 answers
98 views

Cause of stator burn on ER-6F 2009

So yesterday I stopped for gas and when I tried starting the bike again it did not work. After some google-ing I found it was probably the stator. When I opened up the bike the stator had a burn spot. ...
14 votes
5 answers
2k views

Factors Limiting EV Battery Acceptance Rate on DC Fast Chargers

There is a bunch of, relatively speaking, inexpensive EVs with 200-250 mile (320-400 kM) range -- e.g., the Kia Niro, Subaru Solterra, Volvo C40, and late model Nissan Leafs. All, in my experience ...
1 vote
0 answers
391 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 ...
0 votes
1 answer
1k views

How can I charge a depleted motorcycle battery?

I left my motorcycle too long without using it and now it won't start. The last time it happened I brought the bike to a shop, and they were like there is nothing wrong with your bike, it's just out ...
3 votes
2 answers
4k 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 ...
2 votes
1 answer
126 views

Did I damage my car battery?

I have a Smartech battery charger charging my car battery for the last two years since I haven't been driving the car. I just realized I have been charging it wrong. The manual said for a negative ...
13 votes
3 answers
14k views

Charging battery with battery charger vs jump starting and running the car

Got a 1998 Toyota Camry that has an empty battery and am wondering what the best course of action is. I have a battery charger that I am thinking of using but it's currently inconvenient to do. My ...
6 votes
3 answers
7k 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?
9 votes
6 answers
43k 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 ...
-1 votes
1 answer
127 views

How to tell if a battery charger/tender is suitable for hardwiring?

As mentioned in a previous question, I am looking to hardwire a battery charger/tender in my car, so I can just plug it into mains voltage when the battery is drained, or the car is sitting outside in ...
3 votes
2 answers
115k 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 ...
0 votes
0 answers
646 views

Harbor freight jump pack, broken input jack, repairable?

I received a harbor freight Cen-tech battery jump pack as a gift. It got knocked over when I took it camping to charge my phone and inflate my bed. Now the input jack (the part with the prongs) is ...
0 votes
1 answer
3k views

What causes car battery to hold only 5v?

One of my cars was parked for a few months and it couldn't start after that. I could jump start the car and gave it some good drives (2hrs in total) to recharge the battery. However, that didn't help ...
0 votes
0 answers
79 views

When a car battery finishes charging how long do I have to unplug the charger before the battery is damaged?

This needs a little explanation since it only applies to a specific type of charger. My charger is a standard vintage Sears 6/2 amp charger . Back in the day the chargers did not automatically shut ...
0 votes
0 answers
204 views

Swapping a split relay for a DC to DC charger

I am currently exchanging a split relay charger in my motorhome for a DC to DC charger as I am installing a new gel as the house battery and need to regulate the voltage more precisely. I have a fused ...
0 votes
3 answers
902 views

Hardwire a battery charger?

Since my car is currently parked outside in a Northern European winter climate, and only being used for short distances, the battery is sometimes just barely able to start the car, sometimes it can’t ...
5 votes
3 answers
2k views

Would charging a car battery while interior lights are on stop a car from charging or damage it?

Could charging a fairly modern car with lights on (or any other electronics on) damage it? My car battery drained to a voltage of 5.5V (very low I know) because I left the interior light on for 2 days....
0 votes
0 answers
399 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 ...
1 vote
2 answers
108 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 ...
1 vote
2 answers
253 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 ...
11 votes
8 answers
22k 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 ...
0 votes
2 answers
238 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 ...
3 votes
1 answer
86 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. ...
0 votes
2 answers
1k 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 ...
0 votes
2 answers
678 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 ...
1 vote
4 answers
5k 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 ...
2 votes
1 answer
5k 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 ...
6 votes
5 answers
79k 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 ...
1 vote
3 answers
465 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 ...
1 vote
2 answers
1k 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 ...
1 vote
1 answer
164 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 ...
0 votes
5 answers
5k 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 ...
0 votes
2 answers
108 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 ...
1 vote
1 answer
768 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 ...