Cordless Drill Crank Charge Batteries

Introduction: Cordless Drill Crank Charge Batteries

About: I've had many different jobs in my life, but I've discovered my passion: Mental Health Counseling. However, that doesn't keep me from still being a technogeek!

Use any cordless drill as a crank charger for batteries! The basic idea is to use the drill as a crank charge generator, and regulate the voltage to charge 1.2-1.5 volt batteries.

I don't hold this as the be all, end all idea, only as a starting point for discussion and development of better ideas. I'm just showing you what I was able to do using the parts mentioned, but I'm pretty happy with the results, especially as we're about to get an ice storm here that will no doubt knock out our power for a bit.

A couple of notes: The trigger MUST be held down for this to work. The drill is in reverse setting and cranked in reverse.



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    42 Discussions

    Whoa NO! Only if it is a rechargeable battery can you charge it. Recharging a disposable battery can cause it to explode, leaving alkaline acid splattered everywhere. DO NOT attempt to charge a disposable battery for any reason.

    Whoa. Too funny. There is no such thing as alkaline acid!!!!!!!!! The two words Alkaline and Acid are polar opposites, and if you put them together they cancel each other out!!!!

    Replace the word Acid with Corrosive, and your statement is true as both acids and alkalies can be corrosive.

    Excellent idea, but make sure it's a direct-power drill, not an electronic speed controlled one.

    DC drills have a permanent magnet motor, AC drills don't. you need a magnetic field to begin with for an AC drill to produce a current like this.

    Yes! As a matter of fact, Rayovac actually had a rechargeable Alkaline Battery charger at one time. The downside is you could only recharge about 20 times, and each time you got a little less than before.

    Never attempt to recharge a disposable alkaline, or even these fad "rechargeable" alkalines. Boycott alkaline for the real deal, and catch up to the modern era. Alkaline batteries are 19th-century tech, and offensively-obsolete. NiMH and Lithium batteries are offensively superior in every category.

    Yep... they had branded Reusable Alkaline batteries, which is what they banked on making money on, and no one bought!

    Rechargeable alkalines are a scam, invest in the real thing and get 1000+ charges from the same battery.

    Interesting " reverse engineering" idea Anybody try connecting it to a small windmill, waterwheel etc to turn the crank? The regulator would keep it from overcharging I think if you were careful. I wonder if it'd work as a bike generator.....

    1 reply

    The motor alone, maybe, not the gearing for the drill. at 10mph, you would be spinning that motor at over 45,000 rpm with the chuck just rammed into the tire, which would burn the motor. The brushless generator is still the best option unless your power demand is that high.....remember that you have to pedal that power back into the system too, no energy is free...

    does this damage the cordless drill in any way because if im "borrowing my dads", i need to know he didnt know i was screwing arround with it.

    1 reply

    This won't damage a cordless drill, especially the "one-speed" type. You will not get any output from a variable speed, because the circuit will block voltage in reverse. The only damage in most, if not all cases, is wear and tear. Cordless single-speed drills are ideal emergency generators when turned in the same direction as their commonly-used direction (usually backwards with your right hand, if it were a bicycle crank), just remember that the polarity will be reversed. To power the drill in a CW direction puts battery-terminal A as positive, to crank the drill like a generator in the same direction makes the same terminal negative for recharging or general power. A double-ended allen-wrench (or S-wrench) is an ideal crank, and the chuck is all but made for the job. Keep this in mind should some cosmic holocaust befall humanity....Simple motors will not be damaged by the EMP blast, and can still generate power...