Wall-Mounted Cordless Tool Battery Recharging Station

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Project by ChuckM posted 07-14-2011 11:56 PM 4491 views 2 times favorited 4 comments Add to Favorites Watch

The saying “You can never have enough (fill in the blank)” applies to cordless drills. I often overcharged my cordless tool batteries when I forgot and left them overnight, sometimes even for more than a day, in their chargers. It’s high time I built a station with a timer switch so no overcharging would occur anymore.

Mine is made of scrap 1/2” plywood, built in an hour or two, and is meant to be hung on the wall near a power outlet. My design includes space for keeping the spare batteries (4 all together). You’ll also need a power bar if you have more than one charger to install; the power bar is mounted underneath.

I can now recharge any batteries without worrying about overcharging, which is not environmentally friendly.

-- The time I enjoy wasting is not time wasted

4 comments so far

View Ted Pagels's profile

Ted Pagels

63 posts in 3091 days

#1 posted 07-15-2011 04:37 AM


The old fire chief in me talking here: You may want to change the way your power strip is mounted. The photo shows already how the weight of the charger transformers plugged into the power strip are starting to pull away from their respective outlets. This can lead to the plug blades losing some contact internally and may lead to what is known as a “high resistance connection” at the plug blade causing abnormal heat which will eventually cause a fire. Your timer is a great idea to prevent that but gravity should be overcome and allowed to keep the transformer and plug blades in place. These charger plug in ends need ventilation also as they produce heat in the reduction of household AC 120 volt current to DC 1.5 to 18 volts + for charging batteries of tools, phones, etc..

-- Ted Pagels, Green Bay, WI

View ChuckM's profile


608 posts in 3695 days

#2 posted 07-15-2011 05:18 AM

Thanks Ted for the timely advice. It’s always better to be on the safe side. The adaptors were not pushed hard into the bar sockets in the picture. I’ve corrected it now and full contact is achieved for all plugs. I’ll look into ventilation improvement issue. This important ventilation point seems to have also been missed by the charging rack project featured in the July issue of Shopnotes.

-- The time I enjoy wasting is not time wasted

View RexMcKinnon's profile


2593 posts in 3224 days

#3 posted 07-15-2011 05:18 PM

Looks good to me. I would have never picked up on the things Ted mentioned. Great advice. What model timer is that? I want to do something similar in the future.

-- If all you have is a hammer, everything looks like a nail!

View ChuckM's profile


608 posts in 3695 days

#4 posted 07-16-2011 01:51 AM

I believe it’s an earlier Woods outdoor timer. The Noma brand is $14 or so regular ( Check your Walmart store for other choices.

-- The time I enjoy wasting is not time wasted

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