bmclaurin

Ok thanks. Anyone know why this field is omitted for the 75’s?

I’m running escribe 2.0 with my 75C and noticed the Mod tab no longer has a field for Wh capacity of battery. I’m using the Manufacturer interface. Has that been left out intentionally? If so, why? Frankly, I never understood how that setting was used by the chip to estimate remaining battery capacity anyway because it seemed to me that state of charge could be reliably estimated from the discharge curve (.csv) alone.

Mooch rates it as a 25A 2500mAH cell. Obviously, usable capacity will depend on rate of discharge. Mooch's test results indicate ~2300mAH @ 10A, ~2140mAH @ 25A. His tests use a cutoff of 2.8v, so your results will likely vary if you are using a different cutoff voltage in your mod. https://www.e-cigarette-forum.com/forum/threads/sony-vtc5a-2500mah-18650-bench-test-results-a-fantastic-25a-battery.746719/

I didn't see one posted here for this cell, so I ran it myself on a single 18650 DNA 75C squonk mod (Therion 75C BF). I used a 60W discharge because that is the power I tend to use most often with this mod. My soft cutoff is set at 2.75v. LG HD2C (1) (tested at 60W).csv.txt

Sounds like your lipo pack might be bad. Do you have access to another voltmeter to verify the pack and/or cell voltage. If it's truly at ~1.4-1.5v per cell, I personally would not attempt to recharge it. Replacement packs are fairly inexpensive, or maybe the manufacturer would help you out.

EDIT: Deleted post as others had already responded so my response was duplicative.

Are those measurements from the device monitor? If so, almost certainly a contact issue, as those are practically impossible voltages.

3.1v depleted at rest sounds about right due to voltage sag under load. Assuming your cells are reading 4.20v each in the device monitor when fully charged, you likely just need to tweak your Wh setting on the Mod tab and maybe double check your battery .csv file.

Seems a little high to me. Not sure how hard you tend to vape them, but at ~10A, Mooch's tests (over at ECF) yielded 2750mah (down to 2.8v). So they're probably closer to ~19.8-20.3 wh in 2-cell configuration. https://www.e-cigarette-forum.com/forum/threads/lg-hg2-20a-3000mah-18650-bench-retest-results-a-great-20a-battery.714112/

Well the battery analyzer isn't going to make your battery life any better. But it will make your meter more accurate. In terms of the resistor for the test, anything that will dissipate the load without overheating is fine, but I do believe if you're going to use loops of resistance wire, it would be best to use non-TC wire. John posted somewhere a while back that you want a constant resistance for the test. I use 4 large-ish loops of kanthal in parallel around .3 ohms or so in total. Arrange the loops so there is plenty of free space for the heat to dissipate into the surrounding air. A desktop fan wouldn't hurt because it will heat up a bit.

Also, I suppose I should change the max peak and sustained input current on the mod tab to 15A. Would the combination of these settings (i.e., 120W kanthal power limit and 15A max input current) keep me safe while using 15A cells?

I'm thinking about switching to higher capacity 18650's for my Triade that are only 15A cells. Those should be safe for vaping up to ~120W, which is plenty for me. So I plan to set my kanthal power limit in eScribe to 120 watts. Will this setting also be honored when in TC mode?

Because adding a wire in parallel gives the electricity two paths to follow instead of just one, cutting the resistance in half.

Gotcha. Nothing wrong with that.

Until someone more knowledgeable than I comes along...I guess that's true, but TBH I've never bothered with that. Just load up the .csv for whatever coil material you're using and vape on. As long as you're using standard TC materials, the .csv's on steam-engine are battle tested, and I've never had a problem with them. And when I say "never had a problem with them," I mean that literally. We're talking tens of thousands (probably more) of hits, and never a burnt hit. Not even once. The very few times I've had hits that were obviously too warm, it was not TCR-related; usually it was because of a loose leg or maybe an inaccurate cold ohms measurement or something like that.