I’m slowly switching to rechargeable ones (Ikea Ladda ones), but we still have lots of other batteries around.

Do you have a favourite device to test them with? Ideally it could test many different types (regular, coin), but I’m ok with just AA/AAA if there is a cheap/reliable option.

When I did a search just now, I saw recommendations both for and against multimeters/voltmeters. Some said it was easier, and others said that it wasn’t accurate because of testing under load.

Thanks :)

  • jet@hackertalks.comEnglish
    12·
    5 months ago

    any voltmeter will do, and then… you have a voltmeter!

    if you want you can put it under load and test as well.

    • neidu2@feddit.nl
      11·
      5 months ago

      Seconding this, but with the footnote that measuring a battery under load (doesn’t have to be a lot) is vital for accurate results. Spent batteries tend to measure OKish voltages until you put some load on them, during which you will see a massive voltage drop.

    • dbx12@programming.dev
      5·
      5 months ago

      Now I know why there is a dedicated BATT 1.5V and BATT 9V setting on my multimeter. Always thought “why is it there if there is already a 20V= setting?”

      • Otter@lemmy.caOPEnglish
        4·
        5 months ago

        Yea I appreciate the recommendation @[email protected], it was helpful!

        I assume the removal is because of the referral code in the link, but really it’s the fault of Amazon (and similar companies) for hiding trackers inside shortened links. I use extensions/apps to intercept links and it’s still annoying

      • NoneYa@lemm.ee
        3·
        5 months ago

        Thanks for somewhat resurrecting my comment!

        I was going to recreate my comment without that Amazon link but couldn’t find it. Had no idea the mod log could be accessed like this.

        They say there’s a referral in the link, but I swear I didn’t add one. I just grabbed the one that Amazon provides in the official app. I don’t need any points or money for recommending something that worked for me, I just wanted to provide a place I know most people can access. Temu is unfortunately too untrustworthy for long term links for anyone who may come across this in the future.

    • ShepherdPie@midwest.social
      5·
      5 months ago

      Batteries can show good voltage on a multimeter but then drop immediately once a load is applied if they’re failing.

    • kmartburrito@lemmy.world
      4·
      5 months ago

      I was going to say this as well. A multimeter is good to have in the house for certain situations and since they’re pretty cheap (~$20) it’s a good investment if you ever need to test fuses or voltage, continuity, etc.

  • ShepherdPie@midwest.social
    6·
    5 months ago

    I don’t have a recommendation for a tester, but after about a decade of vaping and dealing with 18650s, I will say it can be beneficial to keep batteries paired together (on devices that require more than one cell) during their lifespan so that you don’t have one sagging from old age while the other is still performing well. This probably isn’t as big of an issue on normal electronics that don’t have a massive current load like an ecig, but something to keep in mind. I typically never break up a pair but when I used to have several pairs of batteries, I would just use a sharpie to mark a full set “A” or “1” while the next set is “B” or “2” to avoid mixing them up.

  • BigCanucK42@lemmy.ca
    4·
    5 months ago

    If you want to just test voltage (and not capacity) a standard volt meter will suffice. If you are wanting to test rechargable batteries for their capacity then you will want to cycle them with recordable device that will count the AmpHour (or miliamphour) for discharge and then charge. For this I use an opus3100 tester. Or RC battery charger /discharger

  • Hjalmar@feddit.nu
    3·
    5 months ago

    I have something that is a dedicated battery power meter but looks just like a voltmeter (and it’s probably just one with a different reading on it)