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DeWalt’s done some great things with their cordless tools lately. They just introduced an upgraded lithium-ion battery pack for a new range of tools, but designed the plugs for compatibility with the older generation (which, while clever, isn’t what I’m after here). Most importantly, they’ve built fans into one of their 24V NiCad battery packs as a means of extending life.

Anyone who’s extended their flashlight’s run time by a few minutes by warming the alkaline batteries (with a source no warmer than the nearest armpit unless you don’t like your eyebrows) knows that temperature affects battery life — but in an interesting twist, heat recharges alkalines slightly, but discharges NiCads. So, even with the extra current draw from the fan, this battery’s life is increased over standard models. The amp-hour rating is higher even before the fan’s considered, but that’s no surprise given the battery’s larger-than-normal case.

If longevity is a concern in your line of work, and you happen to use DeWalt 24V tools (there are plenty), this’ll keep you in the game. The battery is $119 shipped from ToolUp.com.

DeWalt DW0242 [ToolUp]
DeWalt DW2042 [DeWalt]

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9 Responses to Cool Batteries

  1. fred says:

    For an interesting read on battery life – you might take a look at Wikipedia:


  2. fastlane says:


    Where have you been? This battery, 24v Nicd has been around for a very long time. As a matter of fact they have killed all but like 2 tools and the charger for the 24v line with NO PLANS to reintroduce tools to the 24v platform.

  3. jeffrey immer says:

    i was going to make some comment on this and the post on the 36 volt application. i have noticed that certain dewalt tools have high drain rates on the 18 volt batteries, especially the impact. i have started using two in tandem to help cure this problem, i realize not everyone can do this, i keep 2 fully loaded with batteries and every so many screw or bolts i switch them out so the other one can cool, i have noticed much a huge increase in battery life span too. here where the summer temps exceeds 120 for around 60 some days i was killing batteries left and right, somewhere to the tune of 1 a week. so anyway the fan i how will actually come to the 18v line or some kind of cooling besides putting them in a freezer (done this several time). i also think using purchasing 2 18 volt impact would be a better investment down the line as opposed to 1 36″ (for roughly the same price you could get 2 chargers, 2 batteries, 2 drills, and 2 impacts) i would think that would make sense. plus have you ever tried the screws and lags from Spax, that is something to write an article about, i was using 3/8″ x 5″ lags no predrilling and the dewalt impacts drove them like a champ

  4. Bill says:

    Dewalt has to be my favorite manufacturer of cordless tools.

  5. Lex Dodson says:


    You’re right, the battery’s nothing new, but most people aren’t quite as familiar with DeWalt’s products as you are (myself obviously included). Part of the point of Toolmonger is showing people things they’re unused to, and while it’s true that DeWalt’s 24V offerings are slim, they still exist, so this battery still has a home.

  6. fastlane says:

    Lex- I just don’t see this as a useful forum to introduce people to tools that are on the way out the door. There is a reason it is going away….it weighs a ton and gives horrible performance compared to 18v nicd and all those levels of Lithium (18, 28, and 36)

  7. john j says:

    The Dewalt 28V and 36V are duds. They are extremely heavy and only serve a very small purpose for anyone in the field. They cost way too much and that is why you can find the 28V and 36V from Dewalt and Bosch on clearance a lot of the time.

  8. fred says:

    Batteries and battery-powered tools do seem to be getting better – and our expectations increase with advances in the technology. I recall a time when we thought that battery-powered tools were only a small-niche product – because the 7 to 10 Volt class batteries were not up to muck beyond poering homeowner-quyality screwdrivers and the like. Our first set of Makita trim saws – were useful but limited. Our first batch of Porter Cable 12 Volt Magnequench Drills were better. Now our 18V LXT Makitas are go-to tools form much of our work.

    All this being said – I have to agree that Toolmonger is a better forum for showcasing what’s new or what’s old – maybe a bit arcane – but is time-tested to fill a niche. Showcasing what’s proven to be a marketing and/or technical flop is of more academic than real interest.

  9. @fastlane

    Toolmonger writers cover modern and antique tools and everything in between. If we unintentionally led you to believe this was a new-release only blog, we regret the error.

    Perhaps instead of posting a lot of critical comments, you might share your knowledge with other readers.

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