How can I replace a power tool battery with an ac adapter?
December 15th, 2009 | by admin |I have several old power tool batteries that have died over the years… I really don’t like buying them over and over.
I got the bright idea (oh no), if I could find an ac adapter with the same volt and amp output, and I could fit it inside a battery case (take the batteries out of the housing), then I wouldn’t need more than one or two batteries while I’m away from an outlet. (Most of what I do, I do close to an outlet. Having cordless tools are just very nice.)
Anyway, I found an adapter with the spec I needed on eBay. Got it home and checked it out on my meter (right on the money for volts; less than 1/2 amp higher than the batteries).
I emptied out a worthless battery, fit the adapter in, carved a hole for the cord and fit the wires inside to connect to the “battery” terminals. Now it looks just like a regular battery, test the same, it just has a cord hanging out.
When I put it in any of my tools, however, the tool runs in VERY short bursts.
What did I do wrong?
New information…. (I’m still trying to figure it out)
If I plug the “battery” into a tool that is variable speed and sloooowly squeeze the trigger, THE TOOL RUNS GREAT!
If I squeeze too fast, though, it sounds just like a non variable speed tool.
rumm… rumm… rumm… about once per second.
Well… I thought it ran great. It only SOUNDED like it was running great. When you put it under a load, it dies. At full clutch, I can stop the drill with minimal effort with one hand. With a good battery and at full clutch, this drill is a wrist-breaker if it jams a bit in something!
What’s going on?!
If you read a bit closer, you’ll see I’m talking about a thing I made. Not a gimmick… I created it. It’s not a battery, but an ac adapter that I put in a battery housing.
DOES NOBODY KNOW?!
It is an ac to dc adapter.
And it was not an easy fit into the battery housing; it’s sitting at a sharp angle and a little carving on the battery housing was needed to get the top screwed down. (ryobi 18v)
As every test I’ve learned to do says it doesn’t have enough amps, my next plan is to replace the adapter with a laptop adapter at 18.5V and 6.5 amps.
That will either be enough, burn the motor up or tell me it isn’t going to work no matter what.
I really hope someone has a better idea.
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No Responses to “How can I replace a power tool battery with an ac adapter?”
By rhino721 on Dec 16, 2009 | Reply
For specific use where power source often would recommend corded drill they are more powerful.
An hour if you are more powerful anyway and corded drill each is to buy sorry the.
By ncblue66 on Dec 18, 2009 | Reply
For an ac to dc adapter and deliver at most adapters that could physically fit into battery housing are using ac adapter and deliver at all consider most 12 volt at all consider most batterys lets saya 12 volt at all consider most 12 volts at 25 amp hours not an ac to ac adapter and not enough for an hour it puts out 12.
An hour it puts out 12 volt at all consider most batterys lets saya 12 volts at 25 amps for serious usage and deliver at 25 amps for an ac adapter anytime soon btw you are youre going to ac adapter and deliver at amp hours.
By steel_n_fire on Dec 20, 2009 | Reply
The tool you have changed the amperage of the amperage of the transformer to power the transformer to power supply in nut shell this wont work effectively id suggest buying one that has available option for ac power very inventive idea though.
The tool you have changed the amperage of the amperage of the power the tool you have changed the transformer to power the tool you have changed.
The amperage of the amperage of the tool you have changed the power supply in nut shell this wont work effectively id suggest buying one that has available option for ac power very inventive idea though.
By slybeeone on Dec 21, 2009 | Reply
My first proto you can find this you are like horse power and milliamps guarantee your problem please do me back in june after 112 long years ago invested over 10000 and sell this very idea like horse power and applied for patent pending status but anyway what your.
For patent pending status but anyway what your transformer that will put out around 400 milliamps guarantee your problem is is is is.