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  1. Mooch

    Samsung 30Q's voltage sag - fake or real?

    Just a quick note...a multimeter can’t be used for measuring internal resistance directly. For DC internal resistance you need to pulse them at two known current levels, measure voltages at both levels, and use Ohm’s Law to calculate the equivalent resistance. A multimeter’s general resistance...
  2. Mooch

    Samsung 30Q's voltage sag - fake or real?

    The quality and style of the wrap printing can vary considerably over time and between factories. I would not put too much stock in that. The capacity measuring accuracy of the chargers we use can be very poor. If you have a known genuine 30Q you can compare it to yours though. Those results...
  3. Mooch

    First mech

    At best, that is a 20A battery. It’s not a very good performer for a mech either.
  4. Mooch

    Lol accidentally discovery

    Custom cells can be built by a large number of companies in China but MOQ usually starts at around 10k pieces. There’s no cell already on the market that fits your requirements? Custom cells keep you tied to that one factory too. If you can use a more common size (or chemistry, current rating...
  5. Mooch

    Hey everyone new member in Canada

    There’s no definition for a “pulse” (it can be any length) and there’s no valid pulse rating for any battery. :)
  6. Mooch

    Hey everyone new member in Canada

    Check the datasheet. Your MOSFET is only rated for 375W for incredibly short amounts of time or only if the junction is kept at room temperature. You aren’t dissipating 375W in the MOSFET though. The Rds-on max spec along with the current you are pulling will tell you how much power the MOSFET...
  7. Mooch

    ESS Technologies Developed by XTAR is Going to Grand Debut at IECIE

    I heard some back room rumblings a while ago. :) Glad to see the Molicels being more widely used! I’ll have to read up on this mysterious ESS stuff when info becomes available.
  8. Mooch

    Picture of Your Setup Part 3!

    Haven’t tested them. :)
  9. Mooch

    New Fakes of VTC6 on the market

    Nkon...reliable vendor. Thanks! Looking at the images on that page they show standard EU regulatory compliance labeling. I think this is a Nkon rewrap created for retail sale. Sony/Murata does not sell VTC loose cells to end users
  10. Mooch

    New Fakes of VTC6 on the market

    Where are these being sold?
  11. Mooch

    New Fakes of VTC6 on the market

    I don’t think that’s a Murata wrap. I think that’s a rewrapped or overwrapped cell with data to comply with regulations (partially) or just a basic wrap. There’s no manufacturer name, no UL logo, and no date/batch code. These are all present on the cells with their original wraps (seen through...
  12. Mooch

    Minding Your mAhs Ep21 – What is battery voltage “sag”?, has been uploaded

    Battery voltage sag robs us of power and creates heat inside the battery. What causes it and how can we reduce it?
  13. Mooch

    Fake LG H2 battery?

    A fake runs at the same voltage range as genuine cells. You can’t tell if a cell is fake or genuine just by measuring the voltage...unfortunately.
  14. Mooch

    Minding Your mAhs – Ep020 – How hard can we “pulse” our batteries? Can we know?

    I don’t know how your charger handles end-of-charge, if it rounds up the voltage to 4.20V or not. Some chargers do stop “early” due to changes in the cell though as it ages.
  15. Mooch

    Mooch’s Recommended Batteries tables have been updated

    These tables are NOT all of the good performing batteries! There are MANY others that could be recommended and that can be used successfully in many mods. Mooch's Recommended Batteries | E-Cigarette Forum These tables are just a few of my recommendations, taking into account performance and/or...
  16. Mooch

    Bench Retest Results: Molicel P42A 4000mAh 21700...beats 40T, one of the best batteries available

    These tests below only note the ESTIMATED ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers...
  17. Mooch

    Minding Your mAhs – Ep020 – How hard can we “pulse” our batteries? Can we know?

    Sorry, I don’t understand. Are you asking if your batteries are wearing out and, if so, that the charger should be showing you that by not charging to as high a voltage?
  18. Mooch

    Fake LG H2 battery?

    That caution print was added by LG to all of their 2500mAh or higher cells a while ago because vapers kept blowing themselves up and suing LG. I believe it might be optional for their large industrial/commercial customers.
  19. Mooch

    Battery venting Aegis is it safe

    Aqueous firefighting solutions and water can quickly lower the cell temperature below the thermal runaway threshold, stopping the reactions and putting it out. Lithium-metal battery fires? I don’t know what’s used for that.
  20. Mooch

    Battery venting Aegis is it safe

    There’s no metallic lithium in a rechargeable Li-ion battery though. Only non-rechargeable lithium-metal batteries have metallic lithium. Our batteries burn so “well” because of the violent, exothermic chemical reactions that occur when the thermal runaway threshold temperature is reached.
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