LumberJocks

Cordless question:

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by poopiekat posted 06-02-2011 02:29 PM 1349 views 0 times favorited 11 replies Add to Favorites Watch
View poopiekat's profile

poopiekat

3634 posts in 2391 days


06-02-2011 02:29 PM

Topic tags/keywords: question 12 volt

I chose the DeWalt 12-volt cordless drill/driver as a Christmas present last year, with an ulterior motive. Knowing we’d be doing some rustic camping far away from a source of electrical power, I figured I could do some repairs on our travel trailer by hooking up the drill directly to either the deep-cycle battery or the truck battery. What I need to know is whether I can recharge the drill battery directly off another 12 volt source, or wire the drill directly to the camper deep-cycle battery. Please respond if you have tried this, and whether or not you got good results. As a kid, I ran my slot car track off a car battery; I’m not afraid of running small DC motors off a big power pack. I just don’t want to wreck some unknown electronic component of a nice drill. TY in advance!

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!


11 replies so far

View brtech's profile

brtech

673 posts in 1579 days


#1 posted 06-02-2011 03:06 PM

You probably don’t want to try charging directly from the 12V unless it’s a NiCAD (not an Li Ion), and even then, you probably won’t get a full charge.

You should be able to run the tool from the camper battery however. Take the battery out, keep the polarity straight and it should work fine.

View dbray45's profile

dbray45

2504 posts in 1433 days


#2 posted 06-02-2011 03:12 PM

If you have an LI battery, plug in an inverter and plug the charger into that. There is loss but the voltages will be correct. It is better to charge with the engine running and charging unless it is a different battery from the vehicle starting battery.

-- David in Damascus, MD

View David's profile

David

196 posts in 1320 days


#3 posted 06-02-2011 03:55 PM

Definitely do not charge the battery pack by directly connecting it to the car battery, especially don’t if it’s a lithium drill battery. Even though the voltages may be close enough, you’ll have no control over how much current is delivered. Search for overcharging lithium battery on youtube to see why.

If you do decide to do it anyway, do it outside away from anything flammable, take a video, post it on youtube, and send me the link. It would probably be entertaining to watch.

-- Perilous to all of us are the devices of an art deeper than we ourselves possess. --Gandalf the Grey http://davidwahl.org/category/woodworking/

View poopiekat's profile

poopiekat

3634 posts in 2391 days


#4 posted 06-02-2011 04:40 PM

Perhaps somebody who HAS either recharged a 12V drill battery pack, or hardwired a cordless 12V drill, to a deep-cycle battery will share his/her thoughts with us.

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

View Gregn's profile

Gregn

1642 posts in 1640 days


#5 posted 06-02-2011 04:51 PM

The best suggestion I can make is to buy a power inverter that connects to the car battery and run your charger off of it to recharge your batteries. You can run other power tools as well depending on the rating on the inverter. Some inverters even plug in to the cigarette lighter.

-- I don't make mistakes, I have great learning lessons, Greg

View Gregn's profile

Gregn

1642 posts in 1640 days


#6 posted 06-02-2011 05:05 PM

I just caught this on another forum on hard wiring to a car battery.
http://www.tractorbynet.com/forums/rural-living/30262-use-12v-car-battery-power.html
So yes you can hardwire to the battery.

-- I don't make mistakes, I have great learning lessons, Greg

View DLCW's profile

DLCW

523 posts in 1311 days


#7 posted 06-02-2011 05:36 PM

I suggest an inverter plugged in to a cigarette lighter, then plug your battery charger in to the inverter. That way the drill battery is charging in its native environment.

-- Don, Diamond Lake Custom Woodworks - http://www.dlwoodworks.com - "If you make something idiot proof, all they do is make a better idiot"

View poopiekat's profile

poopiekat

3634 posts in 2391 days


#8 posted 06-02-2011 06:45 PM

Thanks, Gregn! I’m surprised that a tractor owner’s message board would be such a good source of info on cordless tool usage, but there it is! I’d rather not consider buying an inverter though, it just seems redundant to bump up 12 volts DC to 120 AC, and then back down to 12 volts DC again for charging; especially where using a cordless drill is about where I’d draw the line as far as truly rustic wilderness camping is concerned. Having an inverter onboard would be a great temptation to bring along the laptop, microwave, TV and DVD player and otherwise just not get the hassles of the City out of my head for a while. I just want to drill out some pop-rivets that leave a rusty streak on the surface of the camper, and replace them with aluminum ones, when I’m not busy reading, fishing or hiking. Hard-wiring it is, then! Thanks for all the great replies!

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

View crank49's profile

crank49

3434 posts in 1628 days


#9 posted 06-02-2011 08:58 PM

I haven’t done it, but plan to take the works out of a dead ni-cad battery pack for one of my older 12volt drills and solder a power cord into the empty battery shell with an automotive lighter type plug on the other end. I don’t stand to loose anything here since it’s an old drill for which it has become difficult to find a replacement battery. My battery has only two contact blades to connect to the drill so this is easy to figure out. I think some of the newer batteries, with more features, have more connections and might be less simple to bypass.; but I’m not positive about that.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View BigTiny's profile

BigTiny

1664 posts in 1545 days


#10 posted 06-03-2011 02:11 AM

Watch the Canadian Tire flyers for a sale on an inverter and use it to charge your tools, plus you can watch the game on a small TV using it too.

-- The nicer the nice, the higher the price!

View fernandoindia's profile

fernandoindia

1073 posts in 1600 days


#11 posted 06-03-2011 04:40 AM

Yes Poopie. Hardwire the drill to 12 v car batteries. I keep doing so in my sailboat since ever. Most difficult part is to make firm the wiring to the drill, in a way that when you decide to go unplugged again, everything stays in fashinable order. I do so with a 14.4v Skill drill, which I decided not to replace the batteries. So I permanently soldered the wiring with a 12v cigarrete plug. Watch the section of the wiring that needs to be big enough, and will also depend on how long is the wiring. I made mine of a 2,5 mm2 section for a 8 meter long wire. That is a 12AWG wire size for a 26’ long piece

-- Back home. Fernando

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase