DIY: Home Made Electric bike battery box with cordless tool Dewalt/Milwaukee battery

DIY: Home Made Electric bike battery box with cordless tool Dewalt/Milwaukee battery

Today I will show you how I build a battery box to power my electric bike using cordless tool battery. I’ve also made a different version of this and here’s the video if you want to see it:
For those of you who said laptop battery cells are the same as power tool cells, you should watch this video:

Readers Comments (50)

  1. Superb build! Can’t wait to try it out!!!

  2. Graham Williams April 13, 2021 @ 11:43 pm

    What fuse are you using with the batteries mate

  3. Good practical solution, well done!

  4. I think there might possibly be a way to save board it should be the bms no? Battery management system?

  5. Cool videos, I’m going to do this. I thought I had a lot of brands of cordless tools…got nothing on you lol

  6. Hey i copied your battery setup on my own project. I got a 36v 500 watt front wheel. And im using 2 18v l ion Ozito batterys linked.
    But i had issues the power kept cutting out, once i was out on the road for a bit. And i had to on/off the bike to get it going.
    I could here a clicking in the battery bag, so im thinking the batterys cut out, maybe a safety feature in the new type battery to stop overheating or overload?
    When i got home i chucked the batts on the charger and they still showing 2/3 full.

    So just a few questions.
    1:Do i need older batteries or is there a way to bypass the chip board.
    2:Should i maybe take the batteries apart and make a diy battery with the parts.

    Any advice from anyone is fine.

  7. Great idea def srealing it. Id put 2 side by side on top of your rear carrier instead of up and down

  8. David Ainscough April 13, 2021 @ 11:52 pm

    Hi i bought an ebay ebike battery take a look

  9. @vuaeco may I ask what kind of fuse are you using for this set up ?

  10. Is it posibke to power a 36v motor if i only have those makita 18v batteries?
    Dont’t they produce (2 of them in series )less than 36v nominal under load ?

  11. Carlos Gonzalo Ibanez Alcala April 13, 2021 @ 11:53 pm

    Great explanation! Thanks for the detailed explanation. I had thought of doing the same thing, but it saves you a lot of time to see someone who has done it already.

  12. That is a FAKE Milwaukee battery.

  13. 2111111111111111111113111111|Yy we


  14. Michael Anderson April 13, 2021 @ 11:57 pm

    Tool battery company your missing a market you should be making ebike batteries

  15. AsTheWheelsTurn April 13, 2021 @ 11:57 pm

    this is brilliant. this could also be used as a portable power source for camoing trips, then recharge when you get home. use things you aready have so as to not have to purchase a redundant jumpstarter or recreational battery pack. you could market this man get someone to build it and make sure it is safe you will be a wealthy man.i would buy something like this that takes 4 or 6 18v Makita batterys

  16. 5:20 BEST EBIKE I HAVE HEARD 😅😎🔥


  18. Use a PVC pipe with screws to go over the clip portion of the ryobi batteries soldering the screws with wire in series.

  19. Good information

  20. Love this idea!! ♥ …but you do sound like this guy (lakasambowwwdee.. Granmadduh like resine.. 🤣) sorry x

  21. Thank you for sharing

  22. Robert Tomkinson April 14, 2021 @ 12:09 am

    I’m sorry I didn’t catch that. Did you say you can get 30 miles from 2 cordless tool battery packs? I find that hard to believe. You spent way to much time on arbitrary details as mounting and connecting the battery terminals than the most important information.

  23. Where can I find cells at I live in lenoir hard to find here

  24. I have tried in hand sprayer..its good,simple

  25. Hi..if you want to use the battery with different terminal, just insert it upside dowm to reverse the polarity.

  26. AnthonyMann Wexford April 14, 2021 @ 12:12 am

    very ingenious well done..

  27. very cool next step is to build it less like a prototype

  28. Very interesting, thank-You

  29. Wont that damage the battery’s if you run them to low. Or will the battery manage its own voltage level and turn off before it’s too late.

  30. What are the slots for in the middle of the battery? When I put my tester on the positive and negative it only shows half of the voltage. I am wondering why

  31. It’s like you read my mind except I have to use the Ryobi cuz I have about 50 of those batteries I have a 24 volt system on my bike if I put two batteries together create 36 I have to choke that down 2 approximately 29.4 would you have any recommendations on the DC regulator thanks Dennis and as always terrific video I could even follow this one with my skills thanks

  32. bro your smart

  33. Mine drains so quickly… The original battery is 16V 8A…
    Now i tried 20V 2A from my drill battery it works but drains after 20 minutes

  34. Joey Cottontail aka joe schmo April 14, 2021 @ 12:19 am

    Porter and Black and Decker are also the same but you need to dremel a small notch out of the Black and Decker battery.

  35. Any recommendations on which e bike setup to buy?

  36. Very clever. Looks like a fire hazard but I’ve had plenty of electric scooters catch flames because I fucked with the wiring so I can’t talk down on this

  37. TWO AKA CHEW 😅

  38. This some ghetto rig shit lol

  39. Dick Flinghammer April 14, 2021 @ 12:24 am

    Nice job. I’ll send you 20 dollars for a schematic. Thanks.

  40. Lil.bygotes 2.culturas.records April 14, 2021 @ 12:27 am

    I am very pleased with my new e-bike.Ш The 500w motor gives me plenty of power. Assembly is simple enough if you are even reasonably mechanically inclined. I have only used my e-bike for relatively short trips so I can ride for a few days before I have to change my battery. I read reviews about the brake handles being on wrong side but mine came right. It’s a good buy for the money, fast, and I love it…..

  41. Is the 24 v kobalt 24volts under load?

  42. About how long do they run the bike

  43. Claude Desaulniers April 14, 2021 @ 12:31 am

    Cool. You can use those other batteries, just hook up some alligator clips.

  44. Awesome

  45. Very nice build! I like your practical approach using what’s available and your clear methodical explanations.
    It’s been a year now since you made this video. Would you do anything different now? I see that some of the manufacturers are making bigger batteries now. Would you use them instead?

  46. Great video, would love to see more videos of using ordinary or cheap/low voltage power tool batteries on electric vehicles. Have you used 12V lithium vs lead acid batteries on something like a razor scooter?

  47. Great video.. thank you… I am thinking of doing something similar, but buying two of the cheapest tools (eg flashlights) and removing the battery bases and using those bases on the bike.

  48. Trung is the u?? 😃

  49. Vasilis Poritsanos April 14, 2021 @ 12:37 am

    Well done mate.

  50. the thing i have noticed when using drill batteries, they get very hot under stress

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