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Forum topic by MrRon posted 04-05-2018 05:08 PM 1393 views 0 times favorited 13 replies Add to Favorites Watch
View MrRon's profile


6092 posts in 4408 days

04-05-2018 05:08 PM

I came up with this idea, but after checking how much it would cost to bring it to market, that idea is now zip. That being the case, I will share it with the public to do what they want with it.

My idea is to add an AC adapter to a cordless tool. As we all have experienced, we will be drilling a hole or driving a screw and the battery dies. Without a backup battery, we have to return to a corded drill, if you have one, wait for a battery recharge, or quit for the day.

I propose an adapter that is the same size as the battery, but instead of battery cells inside, an AC to DC circuitry would be inside with a cord to plug into a receptacle. In use, it would be substituted for the dead battery and work would continue. This adapter would be in the shape of the battery and simply plug in to the tool. It could be made for any tool now existing. It would especially be useful for cordless circular saws, that can lose power quickly through a cut.

Although I will not be pursuing a patent, I will be designing one for my own cordless tools.

13 replies so far

View AZWoody's profile


1478 posts in 2388 days

#1 posted 04-05-2018 05:18 PM

Like this?

While not universal, it shows it can be done.

View Andybb's profile


3324 posts in 1768 days

#2 posted 04-05-2018 05:30 PM

Holy cow! For $349 you could buy 10 batteries. :-)

-- Andy - Seattle USA

View ChuckV's profile (online now)


3421 posts in 4691 days

#3 posted 04-05-2018 05:44 PM

It’s hard to understand that price. Here is one for some Dewalt tools that costs $49.

-- "Join the chorus if you can. It'll make of you an honest man." - I. Anderson

View 01ntrain's profile


259 posts in 2234 days

#4 posted 04-05-2018 05:52 PM

It s hard to understand that price. Here is one for some Dewalt tools that costs

- ChuckV

I’m sure it’s just a burp in Amazon’s pricing system. Sometimes you will see things that are crazy priced and it could be the last one, no longer available, etc.

View jonah's profile


2136 posts in 4463 days

#5 posted 04-05-2018 06:20 PM

Festool also has hybrid cordless tools that can take plugs as well as batteries.

It’s a good idea, just not a new one.

View ralbuck's profile


6753 posts in 3430 days

#6 posted 04-05-2018 06:47 PM

I would love to see cordless tools become standardized for batteries across all brands.

Yes; I know it will never happen!

GREED keeps it from ever being a possibility!

-- Wood rescue is good for the environment and me! just rjR

View Ron Aylor's profile

Ron Aylor

2649 posts in 1812 days

#7 posted 04-05-2018 08:28 PM

Holy cow! For $349 you could buy 10 batteries. :-)

- Andybb

WOW … do it by hand and save even more!

View patcollins's profile


1687 posts in 4029 days

#8 posted 04-05-2018 08:52 PM

One thing that an AC/DC converter can’t get you is a big current spike like a battery can deliver.

View SuperCubber's profile


1195 posts in 3449 days

#9 posted 04-06-2018 01:21 AM

Can’t you just get a spare battery?

-- Joe | Spartanburg, SC

View crowie's profile


4774 posts in 3115 days

#10 posted 04-06-2018 11:36 AM

Sorry MrRon,

Cordless means batteries and easier freer operation, so I can’t see the value in adding a cord back to the tool.

If I wanted to or needed to use a corded tool I’ll use one plugged into the powerpoint with it’s limitations….

Just a thought, these days the corded tools do seem to be very competitively priced….

-- Lifes good, Enjoy each new day...... Cheers from "On Top DownUnder" Crowie

View PaulHWood's profile


480 posts in 3417 days

#11 posted 04-06-2018 12:05 PM

And they sometimes come with other tools, win win

Can t you just get a spare battery?

- SuperCubber

-- -Paul, South Carolina Structural Engineer by trade, Crappy Woodworker by choice

View mudflap4869's profile


2130 posts in 2623 days

#12 posted 04-06-2018 01:45 PM

Always have backup batteries charging, or charged up and ready.

-- Still trying to master kindling making

View MrRon's profile


6092 posts in 4408 days

#13 posted 04-06-2018 03:17 PM

I was not aware that AC adapters were available. I have a Makita 12v drill and I will take it’s battery apart and add AC to DC conversion and a cord; no biggie.

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