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  1. M

    *My Entire Stash Must Go* - Tested 18650's & Laptop Batteries

    Well, I got into grad school. And, I'm moving from northern California to Berlin for it. So: - 924tested 18650cells -- Capacity varies I kept anything above 1000 mAh (average is around1800) --400 above 2000mAh - Two boxes of unopened laptop batteries - Two Opus chargers (BT-C3100's) I am...
  2. M

    Hypothetical Farm Irrigation. How impossible is this?

    So my father in-law is a farmer. He irrigates his field via a 20hp continues pump (220v 49.4amp this doesntd equal 20hp but it's what the faceplate says). He was impressed with my efforts for a diy solar / powerwall and asked me what would it take to run his pump. I asked him how often he would...
  3. M

    Peltier Generator Impractical?

    Wanted to pick your gentle-peoples brains on if the concept of using a Thermoelectric generator to charge a small battery pack. The information I am seeing on YouTube and Google are somewhat conflicting. I am not expecting to run my house of this system. I am only looking for a possible system...
  4. M

    How to SAFELY explode a battery?

    Looking for some ideas on how I could safely explode a pouch battery, like macbookbattery, so I can film it for youtube. I know you can overcharge the to failure but I do not have any of that equipment. I'm considering shorting it and running as fast as I can. Yet, I don't like how I'm so close...
  5. M

    Is my fear of Sanyo* rational?

    Greetingseveryone. I've seen some mixed opinions and advice on these cells. Everyone seems to agree that they have a tendency to run hot. My questions: Do you handle these Sonya cells with any additional care? Do you have any additionalcriteria that you factor into accepting/rejecting the...
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