Quick and Dirty Lithium battery for plug in power tools. You can use this to power most plug in tools! One fantastic feature of most power tools; they have universal electric motors. This means they will run just fine on DC power. AC/DC! So I took three, 36V lithium cells and put them in series to power a circular saw.
Long term projects: http://www.Patreon.com/AvE

By AvvE

15 thoughts on “Make a 120 volt battery pack for power tools!”
  1. Avataaar/Circle Created with python_avatars ObsequiousV4 says:

    I'm gonna call you jiggs dinner cuz you're properly cooked lmfao. Quality content

  2. Avataaar/Circle Created with python_avatars James Hancock says:

    Couple of things: Really you should use 170 VDC to get it working the same. And I've thought about a simple VESC that could go inline for something like this that would output 120VAC @ 60hz with a pure sine wave. They're super cheap and produce a perfect sine, so I would think it wouldn't care at all at that point and work perfectly. (20A ones with 200V mosfets are pretty common for $25)

  3. Avataaar/Circle Created with python_avatars Renzor the Red says:

    I came here looking for some kind of battery backpack that I can wear and plug into while using a corded lawn mower, instead of using unreliable cordless ones, but … I guess that doesn't exist outside of the mad science realm? Haha.

  4. Avataaar/Circle Created with python_avatars _ makrelus says:

    ballparker, fabricobbling, beauty is in the eye of the shareholder. this is a toilet book waiting to be illustrated.

  5. Avataaar/Circle Created with python_avatars Craven Moorehead says:

    Hey buddy. If you look at that dewalt 60 volt again it has hidden prongs that only get exposed when you plug it into a 60 volt tool. You can pull its foreskin back and see for yourself. Give it a look let me know if you learned anything. You taught me a ton so i hope this helps.

  6. Avataaar/Circle Created with python_avatars THEMASTEREAL says:

    Use 28 18650 or any other cells in series to make 120v. I’d recommend two 14s bms with it tho in series. Or ditch this stupid idea and just use high power buck boost converters in series to add up to whatever voltage you want

  7. Avataaar/Circle Created with python_avatars kargaroc386 says:

    When you think about it, the commutator there is basically a mechanical inverter.

  8. Avataaar/Circle Created with python_avatars Christopher Bowers Dresser says:

    long time fan AVE, many years i learned from old timers with more skills than patience and it reminds me of the men who knew what they were talking about but still made time for piss and fart humor. Flattery aside…with this video i see (3) 36v batteries 4.4 ah…assuming theyre in series thats 108v still at 4.4 ah. obviously that is enough voltage to move the motor….but heres where my brain locks up…..108v is great and all, but its not 120v please enlighten the dimwit and tell me how this works, shouldnt it be 120?

  9. Avataaar/Circle Created with python_avatars Ed says:

    I would like to run a 120v mig welder from a battery pack , any chance you can build one or even a quick sketch , the few battery powered mig wlelders that are out there are too expensive. Cool power box.

  10. Avataaar/Circle Created with python_avatars Ricky Bobby Racing says:

    How dangerous is this? 😀

  11. Avataaar/Circle Created with python_avatars Guillermo Auslender says:

    Hi man! all your videos are awesome, I can't get enough, so I visit the old ones too.

    Great point you made here, about the extra sparking caused by DC supply. Over time, it might damage the switch of the tool, but not really the batteries. In fact, since that spark is reverse-polarity of what is supplied, it charges your batteries a little! Technically.

    You can suppress that spark adding a (rather big) diode in "antiparallel" with the batteries.

  12. Avataaar/Circle Created with python_avatars Sam Clarke says:

    Those are same batteries that are in hoverboards

  13. Avataaar/Circle Created with python_avatars Uriel Alba says:

    I LILE HOW YOU PULL YOUR SPANISH OUT OF THE SLEAVE🇲🇽👏🇱🇷

  14. Avataaar/Circle Created with python_avatars redneck asmr says:

    haha my solar setup is 120v dc runs a lot of things phone charger, laptop, tools all my lights almost anything without a transformer, 7 20v panels in series for 140v and 10 12v shotty batteries for 126v or 140v charging numbers added up great no charge controller or inverter just dc breakers.

  15. Avataaar/Circle Created with python_avatars Bryan Mengwasser says:

    I’m doing this for a boat I’m building with some friends. It’s an electric boat powered by an industrial vacuum cleaner from a paint shop. I’m using a battery I made for my ebike and using a boost converter. Should run at 1200 watts. Also a universal motor

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