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BillW50

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Posts posted by BillW50

  1. They have quad 2x700 mods, but they are mech mods without a board. They are also called Hammer of God. The one with the DNA250C board has a DNA400C after the name. Yes, misleading, but you get the idea.

    If dropped... its a hunk of aluminum. I never dropped my two, but I would think they would be able to take a lot of abuse. There is really nothing I see that would break or anything. Maybe the plastic window over the screen if it was hit just right. Otherwise there is really nothing.

  2. How about a quad 18650? The Hammer of God (HOG) DNA400C uses a DNA250C with an output of 400 watts (with capable cells). They only make a small batch at a time. So if everyone is out of stock, they will usually do another run in a month or two. Be warned, with batteries they weigh about a pound. They are almost all aluminum. I own two of them and I never had a problem with either.

  3. You want the square (not rectangle) BQ76925 24 pin IC. You are very unlikely find a RGER or a RGET after it. Since that was just for that particular production run. And that one the charging failed! So why would you want one from the same production run? As another one from the same run may likely fail the same fate.

    • Confused 1
  4. 17 minutes ago, Riccs said:

    I saw online that there are many types of that chip. I think i can see  BQ76925 TI [something unreadable] AXH4 on it but i am not sure. 

    What do you think about the new values of USB power and current? Do you think it could be something other than the chip? 

    The AXH4 stuff is version, lot, etc numbers. So those are not important as far as replacement.

    The new values of USB power and current is what I would expect from the older firmware. And yes, I do think it is a failed chip.

    • Thanks 1
  5. That 24 pin (6 pins on each side) square chip right above the USB is the Battery Management IC and is a BQ76925 I think. It controls charging and battery management functions. But if the firmware has it set to not charge, it won't.

    But I would try an earlier firmware version before I would even be thinking of replacing that chip. I hadn't heard any newer firmware incompatibly problems with older board revisions, but who knows. And you can check this in seconds.

    • Like 1
  6. 6 hours ago, Wayneo said:

    None of the standard materials (wire) we use experience a decrease in electrical resistance when their temperature is risen. None at steam-engine either.
    Do you have a datasheet for that product showing either its electrical properties or mechanical properties, showing that decreasing TCR?

    OR Just open a Help Desk ticket and ask. Link in my signature line.

     

    13 minutes ago, sleep deprived said:

    Yes, that is correct.

    Opening up a ticket is the way to go here. As only a firmware update will correct this.

  7. Well if you increase power, you increase voltage, resistance (with TC material), and temperature too, so they all go hand in hand. When you decrease power, you decrease voltage, resistance, and temperature. So when you increase warmth, you are warming the coil faster. Of course, once you hit the max temperature setting, it isn't allowed to go higher and power will drop to keep the temperature from going higher.

    And you can't say like one bump up in Warmth is 10 watts more power. Nor can you say it is 10° warmer. As it isn't calculated that way. As it is based on a percentage of the power setting looking at the Device Manager. There could be other factors in play in the algorithm. As I don't have the source code and I am sure it is a trade secret anyway. But you can see the effects in the graph. And that is what is important. ;)

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