I just came up a similar idea and a similar solution and I'm super excited someone has already done this! Good video.

That was one excellent idea! I'm going to try it as soon as I can! Thank you!

I've done some weird modification to car audio Amplifiers, subwoofers, home amplifiers, subwoofer home amplifiers etc. I gotta do this. Lol. Sorry for being annoying. American people are the best in tutorial and ideas! Love your channel! 👍👍👍

this is a great post.. TY...

As a fellow Dewalt battery hack guy (my most popular video), the thing you're missing is over-discharge protection. If you leave a load on the system with a battery plugged in until it stops working, you will have discharged the battery below the point it is intended to as Dewalt batteries do not have internal discharge protection. This may be fine a few times, but will damage the battery over time and your dewalt charger will likely refuse to charge a battery that has been over discharged (i've had to manually charge over-discharged batteries to make them start working in OEM chargers). I have not found a good 5s li-ion drop in discharge protection module, which has had me scavenging them from old tools to make these sort of projects. Not trying to knock what you're doing, I actually may steal the form factor of using a charger if I find a good discharge protection module because that's a cheaper source for a housing with the physical connectors to mate to the battery that using a tool (I typically try to find burned-motor drills), nor am I a safety whiner. I just wanted to warn you/viewers that doing it this way will mean you'll need to manually monitor your battery charge state.

Be careful when you take it apart not to touch those Compassators they will light you up bad. Found that out the hard way. Lol and that was the first time I ever took anything apart to try and fix it guess you could say it sparked my interest and I started learning everything I could about Electronics and bought a lot of tools lol

Problems with the dewalt cordless batteries is they discharge to dead flat! Balance board is crap. Yet my old LI-ON Ryobi batteries can be completely discharged and recharged! I have jumpstarted my Dewalt batteries a number of times. I have 2 1200 watt dc to dc converters which I have bridged to get 40 amps at a max of 96 volts. I only take it to 18 if I have to jumpstart a car battery. 18 to 20 volts on your vehicle will not damage anything as your car battery will only climb to 14.9 volts because of car battery AH. I have thought of doing exactly what you are saying and doing. I have multiple 100 watt version which if mini fan cooled can put out 10 amps at easy 48 volts. Im gonna do this. I did electronics techie course and Electronics engineering course! So I have to keep building electronics and repairing etc. Im glad I found this. Subbed and liked because I saw this. Very informative video. 🙂👍👍👍. Cheers from Australia!

Thanks!

You REALLY should add a low voltage shut off, specially with them constantly drain the battery, if the cells completely deplete you'll just have a very expensive paperweight.

Awesome hack. Thanks

Very good idea but I would add a low voltage cut out board to it to protect the battery against over discharge.

If you don’t have the security torx bit, then use a small enough punch to fit inside the screw head n give that pin a whack down.

I'd do a current limiting buck converter and I have seen a couple that you can set a low voltage disconnect as well that's not a bad idea

You are a tech brother! I am impressed, I love this stuff but my knowledge is very limited. I would like to hack a charger or a battery or both. To use 120 volt stuff with a dewalt battery. Like irrigation timers.

Good job man! I stumbled across this video trying to repair my DeWalt battery.. SUPER GLAD I came across this info though! I could use a couple of those voltage regulator things for sure. I just started dabbing my feet into trying to understand electronics. Thanks for the upload & really useful info👍🤙 subscribed ✌️

great. project

Just wondering if you could make a power adapter for a flexvolt tool ( mains power to a cordless tool like the miter saw has) but for a single battery. For those times when you run out of batteries or you know you're going to run through a lot of batteries?

This was a Great Video! Very well explained. I just found your channel I enjoy it. Thanks. Have you tried making a DeWALT adapter with the 12V input Plug that will charge the 20V Battery with a solar panel? A different way to put the power in the Battery rather than take it out. LOL

Good video 👍👍

Would like to use a battery to power a bilge pump including an on off switch and voltage adjustment

Neat idea! I have a Dual DeWalt battery charger for the 20V where one side isn't working, though planning to troubleshoot and repair if I can. I have wondered over the years about making an inverter like the power bank that uses the 4 batteries. Thanks for the inspiration! For now, I'm reviewing to make a PAPR power supply since saw the Ford design that uses the DeWalt battery packs and was like... duh... why not use a 20V DeWalt battery or maybe even two and buck down to the 4.5V the current design inflator as a fan is using. I plan to purchase a battery wall mount holder and modify for use since most cost effective. I have a few videos (I am no way trained on video production or editing) on the adapter since I made a Dewalt 20V battery to Ryobi 18V tool adapter from a new Dewalt adapter and old One+ battery. I'm planning to make another video since I learned how the batteries and tool work in more detail and I think I might even be able to repair the bad 20V to 18V DeWalt adapter now that I've learned there is a maybe 60A fuse hidden in a wire/wrap and the two transistors are MOSFET's reads like to check and if nothing in the potted section bad... seems feasible and even then... might be able to design that circuitry once verified. Basically, there is a under voltage protection circuit output in the adapter or the 20V tools, sounds like, that the battery inputs to shut down. I still haven't verified specs yet. However, I was wondering... where did you find six pins? Mine only have 5 pins.

can you make any dewalt charger to work like DCB119 vehicle charger?

I’ve been thinking of something similar

Can we do this to power a lamp? To be more specific, one that plugs into a 110 outlet. Wanting it to power my lamps we use on Job sites.

Is there a way to hack the 110V input charger to use a 12V input?

+1 "John Faber" commernts. Like BaldGuy I have MANY Dewalt 20v AC chargers, (from 2 AH to 8 AH) Would love to learn how to turn any one of them into a DC (cigar lighter) charger, similar to the Dewalt DCB119 but without spending $120. Don't know if Buck Converters can do 110v AC to 12v DC??? Good Video!

You can also use an older high quality computer PSU for free at your recycling center. Those have a lot of AMPS and are quite reliable. Get a dell or HP. I ran a leaf blower once from the 12v line when my battery died.

where i can buy the converter that you use?

How about turning a mains charger into a car charger. is it possible.?

Instead of using strippers for wire that small just hit the end (about 1/4" worth) with a small torch. It'll burn it to the point you can just rub the end between your fingers and it falls off

One of the nice channel logos ever seen

I want to run my Dewalt 20V fan from the wall. How can I use an old battery and add a cord to power the fan this way? Basically, I want a DCA120, but 20V so a DCA20 that I can connect instead of a battery pack to 20V tools/items like my fan.

How would one wire a corded "battery pack"? I'm looking to make something like that for my cordless tools in case of emergencies or times when I don't have a charged battery and need to use a drill or saw.

Gday mate... good to see you getting into the guts of a charger... would you have any advice for me regarding my charger which got some water on it and now although it indicates proper operation, does not actually charge the batteries. I havent gone into the guts of it as yet and wondered if you have had any experience with maybe a fuse or something that is replaceable that might have caused this problem. Regards Chris

I am interested in how to use an external power supply to at DeWalt tripod light DCL079. I have an old battery and a 19V laptop charger, but can’t figure out how to power the light on. We have to use B+, B-, TH and C3 terminals.

What about using an old DeWalt charger base like this but with a 12vdc supply and a cigarette lighter plug so you can charge the DeWalt batteries on the job site or driving down the road? DeWalt has the DCB119 but that rascal's a hundred bucks!

I am trying to make a cordless DeWalt circular saw DCS391 into a corded saw. Can you give ideas?

Hi thats a great idea.Would you be able to tell me how to use my dewalt charger to charge a battery that only has 5 pins instead of 8 please,many thanks Mark.

So, there’s an easier way. Buy a 3D printed DeWalt battery adapter and add your buck converter or DC to DC solid state converter into the mix. So if you don’t have the extra chargers, this is the route I’d go. But if you do have these extra chargers laying around, it looks like a fun way to tinker.

not sure if it's been mentioned (and awesome idea in and of itself) but the more the drop between the input and output voltages the more heat is generated in the buck converter. what would be better (and sometimes more efficient) is to run your 5 volt regulator from the 12 volt regulator and not VBAT

110 volt battery charger 945. DeWalt

Will this kill the battery by depleting the cells completely instead of disconnecting when there is low voltage?

Want help to solar charge a powertool battery then power led lights.Goal is to overcome the lack of sunlight in winter and not enough battery in the original light. Thanks.

WHAT DO YOU THINK OF THE BATTERY ADAPTERS (FOUND ON EBAY/AMAZON) FOR CORDLESS TOOLS (USE AN M18 BATTERY ON A 20V DEWALT TOOL)? MY CONCERN: THE ADAPTERS HAVE ONLY POSITIVE AND NEGATIVE CONTACTS. THE TOOLS USUALLY HAVE AN ADITIONAL 2 CONTACTS FOR SYSTEM MANAGEMENT. THESE ADAPTERS ARE ABLE TO RUN THE TOOLS BUT, WILL THE BATTERIES BE DAMAGED DUE TO OVER DISCHARGING?

How does the converter affect battery life compared to using say a 18v 9ah battery normally. Will a 18v battery converted down to 12 volts last longer then if it was used at the 18 volts? Great video.

Have you , or any of your followers made any progress on how we can run a 20volt MAX Dewlt tool of 120 AC input. Those far the only thing I am seeing is to use a old PC power supply to get the required amperage needed by say a circular saw or saw zaw?

I have the Dewalt 20v tower light. I’ve often wondered if it could be converted to 110v using one of the extra 20v chargers. Would you know how that can be achieved?

u are using expensive dewalt charger as a housing only... good job!

I’m just buying my first set of wires and really don’t quite have an understanding of anything electrical but I thought the same as you...why can’t I convert my Dewalt batteries to be an emergency backup for my Cpap? I’ve purchased a step down buck converter and just have a question on what voltage and amperage to set up a cigarette lighter car type socket to plug in my Cpap machine. Thinking 13.3 volts and 9.6 amps. Any feedback would be appreciated. Also bought a low voltage cutoff unit to add to mine since I have no idea what you did on that circuit board.

Is it a possibility to make me a power supply for my milwaukee chop saw. Willing to pay a good amount for ut! Thanks, Dustin

Take a multi battery charger and turn it into a power station? Like the DeWalt PS ?

Have you converted a DEWALT charger be powered by solar.??? 🌞 🌞🙌

Just use the dewalt usb adapter and a dc to dc inverter with a usb plug (eBay 5$) . It has a potentiometer built in. Nice work however.

Link for the DC converter

I might have missed it, but do you have any protection for over-discharge in this?

I would like to make a 110v system to run my RV using Dewalt batteries. Any ideas on how I could do this?

Could that power supply setup be used for powering a 12v bilge pump to run a mini sluice?

Build me one I’ll buy it .

Is it possible to make a 110v AC to 12 or 24v DC Variable Volt and Current output Power supply? Using a Dewalt battery charger to power a 100watt LED full spectrum Growing light.

DeWalt charges $110 for their DC to DC charger which is insane when all you need is a $20 converter circuit.

Why doesn't someone make an adapter to use 120 volt AC on 20 volt DC DeWalt? And the same for other brands?

EXAMPLE VIDEO LINK: kzfaq.info/get/bejne/g9eUbNp9mp_IpGw.html

Hack the charger to use a DC power source to charge the batteries. ie. 12-48v DC input to charge regular Dewalt batteries.

I’ve been rackin’ my brain trying to learn about buck converters to make a 12v kayak and camping power station out of my Ryobi 18v one+ batteries. This video is exactly what I wanted to do!!! Thank you for the information!! My question is: could I use two 18v batteries ran in a series to 36v then buck them down to a 12v output to get more amp hours (or total watt hours) out of the power supply? Would it be beneficial or redundant to run two?

Send me one of your chargers please

I need a charger sell one

the best idea if you wanna kill your 100USD battery. dont do this at home. it may cause fire.