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   Jake Hildreth (acorn) :blacker_heart_outline: (horse@infosec.exchange)'s status on Tuesday, 31-Jan-2023 23:03:32 JST Jake Hildreth (acorn) :blacker_heart_outline:

   in reply to

   • Lars Karlslund :verified:
   • verb (printfJess) ?

   @lkarlslund @verb

   >mostly without the risk of dying

   Nice qualifier!

   • Embed this notice
     Lars Karlslund :verified: (lkarlslund@infosec.exchange)'s status on Tuesday, 31-Jan-2023 23:03:34 JST Lars Karlslund :verified:

     in reply to

     • verb (printfJess) ?

     @verb battery welder! It transforms the 230V AC down to 2V or so, just with a huge amount of amps. It welds nickel tabs to the end of batteries, mostly without the risk of dying while you use it. There are lots of instructions on how to build this on the internet.

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     verb (printfJess) ? (verb@ioc.exchange)'s status on Tuesday, 31-Jan-2023 23:03:37 JST verb (printfJess) ?

     in reply to

     • Lars Karlslund :verified:

     @lkarlslund are you aiming at your neighbours across the street when they have loud parties? What is this?

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     Lars Karlslund :verified: (lkarlslund@infosec.exchange)'s status on Tuesday, 31-Jan-2023 23:03:39 JST Lars Karlslund :verified:

     in reply to

     This is my very much improvised battery welder. It's the transformer from a microwave, some heavy duty wire and a Sonoff wifi switch which I've programmed to switch on for 200ms and then off when I press the black button. Very ghetto, but it works really great.

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     Lars Karlslund :verified: (lkarlslund@infosec.exchange)'s status on Tuesday, 31-Jan-2023 23:03:40 JST Lars Karlslund :verified:

     in reply to

     So measuring voltage across the cells shows 0V output from the battery, and 1.2V across all cells (they should be around 12V to 16V). So the battery collapsed, it could still be the motherboard though. Anyway, I'm replacing the cells with some others I pulled from some laptops. After removing the old ones, I carefully weld new-old ones back.

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     Lars Karlslund :verified: (lkarlslund@infosec.exchange)'s status on Tuesday, 31-Jan-2023 23:03:42 JST Lars Karlslund :verified:

     A friend gave me a broken laptop, with no clear problem description. There was no charger, so after rummaging around in my stuff, I found an HP charger that should work. The laptop was fine, but even though it said "charging" and had s an orange LED the battery stayed in 0% ... Reinstalling, BIOS update etc. didn't help, and the only stuff on YouTube was garbage. So it either the battery or the motherboard. Let's disassemble the battery!