(for various reasons I needed to join a mismatched pair of 18v drill and battery, annoyed at how much fun it was)

      • remotelove@lemmy.caEnglish
        2·
        2 months ago

        Yes, and also… Please make a good faith attempt to understand allowable continuous discharge rates for the batteries. (Spoiler: Most battery packs are going to be well within a safe range and may also limit output current.)

        For example: If a drill has a maximum current draw of 2 amps and the pack is only capable of discharge rate of 1 amp, you are risking a thermal runaway condition. (Lithium batteries get esplody in those conditions.)

        Battery packs generally use a series-parallel wiring arrangement to decrease per-cell discharge and any protection circuits should limit total current draw. Knockoff battery packs may lack protection circuits, but for this specific problem the way the batteries are wired should prevent or limit any issues.

        (I get a bit preachy when it comes to battery safety. Sorry. Many people simply do not realize how energy-dense our device batteries are these days.)

  • 1stQ@feddit.orgEnglish
    1·
    2 months ago

    I made Franken - Bluetooth speakers. Works better than I thought. One 3rd party ryobi battery is enough for a festival week. The second Bosh lawnmower battery adaptor works fine too.

    • Monument@lemmy.sdf.orgEnglish
      1·
      2 months ago

      A couple years ago I got an electric lawnmower super cheap. I only discovered earlier this summer the lawnmower and accompanying weed whacker were being discontinued, and if they break in ways I can’t fix, I’ll have a 60v, 5 amp battery to recycle play with.
      It hasn’t occurred to me to reuse the battery for some other fun project. There will be shenanigans.

    • cashmaggot@piefed.socialEnglish
      0·
      2 months ago

      Oh my, you’re who I want to talk to. I have been thinking about making a speaker probably for the opposite reason you did. I want it to be quiet. Quiet as a little mouse. Do you mind guiding me towards your method? Because I am just at the beginnings, but I was wondering if the hardware does the work, or if you get the fixings and then load the hardware up with something open-source. So if you’ve got the time, please let me know!

      Also GJ on the frankenspeaker!

  • MisterD@lemmy.caEnglish
    0·
    2 months ago

    They sell these on Amazon.

    Then somebody decided: enough of this proprietary shit and made one battery that works with all (almost)

    https://ceenr.com/

    (Oops, GIF upload is not supported on lemmy?!?)