DeWalt cordless tools,12volt car charger

[Handyman]

DeWalt cordless tools, and charging the batteries by 12volt car battery charger

over the years I have bought and acquired a number of dewalt 18 volt power tools,
a 1/2" drill, small circular saw, reciprocating saw, and just the other day I bought a "cut off/grinder"

now the problem comes in a powerless situation is charging the batteries,
and dewalt chargers will fry if a low quality inverter is used, on them, so one would need a true sine wave inverter, (see quote at bottom)

OR they make a 12 volt automobile charger, I ordered two of the 12 volt auto chargers, they work on 7.2 volt through 18 volt batteries,

Dewalt DW9109 7.2V-18V 1 Hour Vehicle Charger
http://www.toolking.com/productinfo.aspx?cid=94&productid=822
(link for information pourposes)

so in a power outage there is still a way to recharge the battery powered tools,
or when your away from power

The Dewalt line the 12 volt auto/truck powered, charger.
the retail price is about $100, on ebay they can be had for about $50 (new), and at tool king they go for about $75

I see Makita, and Milwaukee, also makes one that can charge there batteries from an automobile/truck,

~~~~~~~~~~~~~~~~~~~~

http://www.rvsolarelectric.com/inverter2.htm
"MODIFIED SINE WAVE TYPE INVERTER CHARGERS
The AC power can run most RV appliances except Dewalt & First Alert battery chargers, some GFI plugs, Laser and copy machines and a few other specialized equipment."

 

[Grock]

Ebay ref:

http://cgi.ebay.com/DEWALT-7-2V-18V...ryZ50896QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

$52.

 

[theoutlands]

What about a car-charger for the Black & Decker 18v batt's? Or - should I give that one to my dad and change brands??

 

[A.T.Hagan]

Well, far out. This is good to know as I've got a DeWalt 12v cordless drill that I use quite a lot and have wondered about how to charge the thing in a power failure as I've read the chargers are very sensitive to power quality. Thanks for letting us know!

.....Alan.

 

[Donald Shimoda]

Perhaps something like this would be helpful?

http://theepicenter.com/tow02077.html

 

[LoupGarou]

Another option is to wait till one of the battery packs dies and "gut" all of the cells, and JUST the cells out (remember to recycle the cells). Keep all of the hardware, including the wiring up to the plug that is inserted into the tool. You should be left with a red and a black wire that is looking for 18.5 to 22 Volts for a 18V tool. Pick up four of the 25A bridge rectifiers (#276-1185) at Radioshack and wire them in parallel-series so that the load is shared across the two sets in series (will post schematic later). Hook the paralleled outputs (+/-) to the red and black wires (red to +, black to -), and hook the paralleled inputs (the ~/~ AC input leads) to a Molex power connector. For power, tie two AGM (or other lead acid batteries) in series for 25.2 Volts (which the four bridge rectifiers reduce down to 20-22 Volts for the tool. I have done this conversion for several of both DeWalt and Ryobi 18V packs. Place a 50 Amp blade fuse and holder at the end with the battery to limit max current on the safe side (the saws, Reciprocating and circular eat current like no tomorrow!).

If you have the 14.4V or 12V tools, you can convert them with even less. the 14.4V tools require no voltage dropping, just connect the two leads in the pack to a connector and wire it to ONE battery straight. The 12V tools should be run with one bridge rectifier wired as above to drop the voltage down closer to 12V, again, only ONE battery is needed. I have over two dozen of these (all 18V, 14.4V, or 12V, and both Ryobi and DeWalt) converted and have had no problems, as well as converted several other people's tools locally. The AGM/lead acid batteries can be charged by AC charger, running the car, or by solar/other means. And I have used deep cycle, 37AH AGM, and tractor batteries. The 37AH AGM batteries run the tools for about a week to a week and a half of good use before needing recharging, while the bigger deep cycle batteries will last just over a month before charging. This modification also makes the tool a lot lighter since the pack is now for the most part, empty. The cord is somewhat of a drawback, but you are still free of the AC outlet. I keep a connector for the 14.4/12V tools in the back of my truck so I can run directly off of the truck and I have both a 14.4V/12V connector as well as a 18V connector on my backhoe (second set of batteries onboard). Makes working around the land a whole lot easier.

Loup Garou

 

[buttie]

I asked for one of these for Christmas and got a 120V charger

 

[Handyman]

I do not know if you can use the Dewalt charger for the Black and decker or not, I was told by a friend at one time you could trim off a little plastic on the Black and Decker battery and use in Dewalt tool, but I do not have any conformation of this, (Dewalt is basically Black and decker industrial line or it was when it first was launched, at one time you could buy the same tool either in Dewalt or Black and Decker industrial)

this site give indication that the fire storm batteries can be used in a dewalt charger
http://www.788.com/main.php?id=13&n=B0000302V1,B0001YVYEG,B00004ZARP,B0000302V0&mode=universal

Replacement Battery Recharger for PS140
I've been using the Dewalt DW9116 recharger since I burned out two Firestorm rechargers. It works great-recharges in an hour or less and has a "tuneup mode" that helps battery life. It also takes stem type batteries from 7.2-18volt. Also the Dewalt DC9091 battery is a identical to the B&D PS140

But before I bought a dewalt charger for B&D product I would at least take the battery to a hardware store and see if it would fit into a charger, or see if you can find a friend with charger or battery to test it first,

 

[theoutlands]

Wow - thanks guys!! I'm sure some of the local hardware shops would let me try out the B&D batt on other rechargers before a purchase. Converting to a semi-corded style would prolly work, as well, but I'd end up building a batt-cart for those "over yonder" jobs!

 

[LoupGarou]

Wow - thanks guys!! I'm sure some of the local hardware shops would let me try out the B&D batt on other rechargers before a purchase. Converting to a semi-corded style would prolly work, as well, but I'd end up building a batt-cart for those "over yonder" jobs!

Two motorcycle batteries will run it for about a day, and you can throw them in a five gallon bucket and put your tools on top. Plus they will charge with a smaller solar panel.

Loup Garou

 

[theoutlands]

Loop - I have one of those little green "rolling garden seats" that has a storage compartment that sounds about right. Plus, since I have smaller solar panels...

Don - I need to show that to a couple of my friends and acquaintences. That'd work, assuming I have gasoline I wanted to use. Thanks for reminding me that I have those plans stashed away somewhere!

 

[Synap]

When the batts in a 7.5V B&D went south (new batts cost almost as much as the drill!), I just direct wired (long cord) to a 12V batt w/battery clips. 'Course one of the small UPS batts like Loup mentioned would work with a belt holster for greater mobility. Anyway it's just a DC motor..all that happens with going from 7.5VDC to 12VDC is the drill runs faster (18V types would run slower). No longer has 2-speed but not a biggie or even a plus for drilling purposes.