Can You Charge The Battery While It's Connected To The Car?

Content of this video:
00:00 Intro
00:30 Disclaimer
02:06 About the problem and recharging the battery
03:18 Safety precautions
05:45 How to connect the battery charger?
07:49 Tips for recharging the battery
08:58 How to disconnect the battery charger?
09:53 Conclusion
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One of the most popular solutions for a flat battery problem is to connect the battery charger while the battery is still in the car.
This, in most cases, is the quickest and most simple solution which comes in handy especially if you're in a hurry and don't have the time to take off the battery completely.
But the most commonly asked question is can you charge the battery while it's connected to the car?
This video will give some insight on this topic and also show you how other useful things like how to properly connect the battery charger, disconnect it afterward, and more.

Hope the video helps!
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Thanks for your time and thanks for watching!

[chrisgraham]

56 years of vehicle ownership and charging multiple family vehicles, I've never removed the battery from the vehicle or disconnected the battery from the vehicle to charge it. Never seen a service garage or a roadside tow truck do it either. With modern vehicles, disconnecting the battery, without an auxiliary power source will delete the data from multiple computers in the vehicle.

[mijalic]

The Answer is Yes. 9:55 And it is smart to leave one window open because some time when electronics get juice automaticly close all doors. If your key is inside at that moment you better have opening to reach it.

[v.h.]

Thank you for this. Easy to understand and responsibly done.

[jeffobi]

Excellent video! Thank you very much for a very complete explanation of the process.

[judyhenley]

Thank U! It's been a while since I've done this!

[garyp]

With all the computer stuff in these news vehicles, I'm afraid to charge it while it's hooked up to the car. In fact, last year I changed the battery in my 2017 Ram. Sure enough for about 3 weeks, weird stuff was happening when driving. Radio would come on when off, blower fan would go to high when on low and the remote start didn't work. It took at least 3 weeks for everything to work the bugs out. Like I said, who knows what possible damage could occur when charging in the vehicle. Nope, I'll take mine out and do it. Good video, though. Thanks for posting!

[liamcoggan]

How you’ve made an 11 minute video out of this is beyond me. Takes 10 seconds to answer this question

[maskedavenger]

You should make sure there is an inline fuse fitted to the live wire from charger / tender to live on battery terminal .

[yanassi]

I have a different question about this. If i’m leaving the car for a few days on some really cold days (say a trip and i’ve parked the car in an airport lot). Can i connect the keep the car charged by using a solar panel on the dashboard, connected to a power controller then to the cigarette lighter outlet? And of course, if possible, how?

[tomhammer]

Two days ago it was 15° below zero and I charged my battery outside and 3 hours later it started right off. Taking the battery off the car at -15° and blowing wind would have been hazardous to my health.

[YLDNSXY]

Thanks ! Very informative and concise !

[kevinjacobs]

Have always charged in the car and my stop/start car has had no issues with it.
Be Driving 45 years. One of my chargers is almost 45years old and I still use it in both of my cars.

[studiomanagement]

Thank you for your video. After charging and starting the car, or van in my case, how long should I let the engine run so the battery will startthe next time?

[banoffeepirate]

I’ve just got myself battery charger for mine as I hardly use car so it’s always going flat. I’ve always had a portable power pack though that can jump start cars they are super handy especially if you have to jump car and get somewhere but can’t restart. I will sit mine inside car then run wire out doors and into the front while mine charges thanks for the video was a little clueless

[DakotaKimberstone]

Sir can I used a battery charger for jump start, means while the battery charger is plugged to an outlet and both positive & the negative cables are properly placed to its corresponding battery terminals then start a car?

[rodneyhinkley]

I have CTEK chargers and i use them anytime i feel the vehicle/motorcycle needs a top up and have done this for 30 plus years, without removing battery terminals, plus it doesn't hurt to give batteries a top up especially if there continually doing start/ stop driving or sitting around as the newer vehicles have quite a bit of draw from battery while not being used .

[jimgraham]

I have trickle chargers and trickle chargers that came from with the vehicle new. Never was it recommended to disconnect a cable. Disconnecting the cable actually would cause a problem that the car would have to be flat bedded to the dealer. (The battery died and it had to be flat bedded because it locked everything up) I also asked at my local GMC dealer and they do not disconnect a cable. My charger is big and heavy on wheels and I used it on Class 8 trucks.

[martymartin]

I charged a Peugeot before without disconnecting the battery and after i started it there was miss fire. Maybe it affected something in the cars computer or something. Lucky after i stopped and restarted it ran fine. I never done this again. Luckily my old Peugeot has clamps which hold the terminals on the battery and u don't need a spanner, its a great Idea and i haven't seen that before, so now i just unclip the terminals when charging but don't need to lift out the battery.

[davyarthurs]

If your car has stop/start and a battery monitoring system (BMS) it's worth connecting the negative connector the otherside of the BMS sensor so the BMS knows the battery is getting charged (an earthing point is fine).

[theresilientsurvivor]

I have charged my car battery several times without disconnecting it and never had a problem.