How to Charge 12V Car Battery with 19V Laptop charger | DIY Car Battery Charger

In this video you will see a very simple way how to charge a 12 volts car or a motorcycle battery with 19 Volts laptop power adapter (laptop charger)

Difference between 19 and 12 voltages drops on a light bulb, I’ve used 12 volts 21 watt light bulb.

If you need higher current use two 21W bulbs in pararel, or you can use just one 55W light bulb.

Important: Charging will NOT stop automatically even if battery become fully charged, so you need to disconnect charger manually when a battery reaches 14.2 volts, or when cells of the battery starts to release hydrogen.

Do you have any questions? ask in the comments below.


Maintain your Battery with Optima’s Digital 1200 Battery Charger

This isn’t your grandfather’s battery charger. Slick features, easy to use and understand controls as well as several industry firsts make the OPTIMA Chargers Digital 1200 12-volt Battery Charger stand out in a very crowded market.

View the complete story at:


Visit Power Automedia’s Online Magazines! Power Automedia is the #1 Automotive Performance Digital Publisher!

Ford & Mustang –
Hot Rods & Muscle Cars –
Drag Racing –
Street Rods! –
Chevy Muscle Cars –
Engine Performance –
Corvette –
Dirt Track –


Solar Battery Charger maintainer for car, rv, and truck

Addition: 11/30/2015 I was talk’n to a guy who owns a number of trucks parked in Idaho, and he uses these solar chargers. He says he hooked them up directly to his battery and he didn’t put the panel in in the windshield. He mounted it on top/outside some how. So anyone wanting to try this might keep this in mind.

This solar battery charger/maintainer is used to keep the batteries maintained during cold weather and while the vehicle is parked for long periods of time without starting. As I reported in one of my previous videos I have been having a problem with my batteries in my Kenworth T 2000. So I went ahead and bought this 2.5 watt solar charger/maintainer to see if it’ll help keep the batteries up. It’s plug into my cigarette lighter. I’ll get back when I can, on how well it works out. I looked around on the net. It was cheaper and faster just go to Autozone. They had the best price and I didn’t have to wait for it to be shipped. The guy at Autozone said he has a friend that uses this charger to keep the batteries up in his rv and it works great. UPDATE: after 1 wk + I can’t yet vouch for the product. After 3 days sitting the truck was hard to start but it did start.

Addition: 3/18/15. I just tried starting my truck after 2 days beyond the last time started. It will not start. I can’t vouch for this product yet.


How To Test A 12 Volt Car Battery Charger 2-10 Amp Charger. Harbor Freight Item# 60581

Testing the Second Failed Harbor Freight Item #60581
I could not find a video on this, so, I made one real quick, while I was super pissed off, that the SECOND charger I received was no better than the first… Here is how you can test them.. I didn’t see anyone else who had done a video on this, and it needs to be out there, as lousy a video as it was.. Grrr… But, it will help if you need it.
NOTE: If you are not pretty sure that your Boost is not working, maybe you should not do this test on boost with a 10 amp setting.. Might blow a fuse or burn out your $5.00 meter..
I made this video for Harbor Freight, when I wanted to send the 3rd unit back in for a refund, rather than swap it out for another one..
I bought a Die Hard 200 amp boost roll around charger.. Best charger I have ever had and makes quick work out of the dual Bus Batteries I have to charge and jump from time to time..


Harbor Freight 10/2/50 Amp Battery Charger Review FAIL Part 2

Inside the box we see the reason it cannot supply 50A and cuts out. Has a Bussmann 20A self resetting circuit breaker. I also explore modifying circuit to have a switch to force voltage at clamps. This experiment did not go well. as even if I jumpered the AC relay and forced power to the transformer the regulator circuit would still not power on.


Charging a Dead Battery – NOCO Genius G7200 Battery Charger

Charging a battery is something everyone should know how to do.
Visit NOCO’s website ►
Subscribe to How Farms Work ►
Facebook ►
How Farms Work Store ►


Genius Battery Charger, Wicked Smart Charger Review, dual bank charger. PowerModz!

If you own a boat, UTV, RV, or 4×4 running dual batteries then this little smart charger will be perfect for you. It’s waterproof, detects reverse polarity, overcurrent/charge/load, short circuit and more, it takes the thinking out of charging a battery – it is a Genius Battery Charger.


Xantrex Tech Tip – TRUECharge2 Battery Charger Remote Panels

In this video, the Xantrex engineer talks about the TRUECharge2 battery charger and remote panels of different generations. The present generation remote panel (808-8040-01) allows two chargers to be stacked in parallel.


Auto turn off for battery charger

Download archive
Buy cheaper battery charger

Buy Module auto turn off

2nd part
3rd part


Battery Charging Hub for DJI Phantom 4 | Hands-on Review

The Battery Charging Hub ( for the DJI Phantom 4 ( is supposed to charge up to three intelligent flight batteries at a time. How does it look like, what are it’s pros and cons and does it have any hidden features?

Battery Charging Hub for P4 Productlink:

Battery Charging Hub for P3 Productlink:

Best DJI Deals:

Videos, Blog, Accessories and more:

Top 30+ Drone Accessories:

Join me on Facebook:

DJI Phantom 4 Playlist:

Please support my work for free (or leave a PayPal donation) at:

Some of the links above are affiliate links.