Wayneo

It's a 3 cell mod. That's 3@1200mAh, so 3,600mAh total or about a single 21700 battery. Your vaping habits will dictate length of usage. LiPo's will have lower voltage sag overall compared to a round cell (all things being equal). You are limited by the cavity size for what will fit inside. If you're lucky you might find a bigger cell but it would probably only be an extra 100-200 more mAh. Hobbyking has a LiPo sizer. I'd look at the dimensions of that Turnigy and use the sizer for other 3S batteries, or Amazon or an RC store. Edit: Your picture of yours looks like an OG 'Fullymax' battery, used by many vendors, including the Steamcrave Hadron Pros, but hard to find at retail. I have 6 LiPo mods and can say they like to be used, as they can easily get out of balance a little. Like your cell 1 which in all screenshots is 0.03V lower. That might add 10 minutes extra charge time.

Did not matter at all. It's just the sum of the 3 cell voltages. If you look, they're all pretty much the same and your mod is charging ~1A. All looks good. At lower voltages that charging would be closer to 2A, and will now continue to decrease from 1A the closer it gets to full. Full could be 4.1V or 4.2V, depending on how the mod was setup. After it's fully charged, while plugged in, you could also enable 'Power' and 'Power set', take a puff, pause the screen and that will show how each individual cell is operating. You could post that screenshot if you want us to look at it.

You might be prompted to update the firmware. I would, but you don't have to. After sorting this, there are options for what's shown on the screen during charging. You could choose ‘cell 1’, ‘cell 2’ and ‘cell 3’ so you won't need to plug in, in the future. That would be under the screen tab, as shown. * Any changes made within escribe must be followed by clicking on 'upload settings to device'

Let's first check if the battery is out of balance. No meter required as cell voltages are shown in 'Device Monitor' Start escribe with your mod plugged in, then Device Monitor. Only enable/click the ‘cell 1’, ‘cell 2’ and ‘cell 3’ fields as shown on the left hand side. Post a full screenshot. ⬇️ Screenshot instructions in my signature line. ⬇️

Here you go

It might be a surface mount button, you'd need to check, but you can disassemble the button down to the black base. If you're talking about the 100C, here's the pinouts.

You're welcome. I'm gonna change the subject title to better reflect the issue. Hope you don't mind.

Similar to this.

Were both batteries charged externally? And what make and model are they? Look at each battery's voltage right now. Unplug your mod, and swap the battery positions in your mod. If cell 1 (old cell 2) still shows lower than cell 1, then we know something is wrong with that area. Either way you might want to clean all their contacts with Isopropyl alcohol (IPO), or even better, semi dismantle the mod and look for ejuice and wipe down the area around the bottom of the board (both sides), those 2 fatter connections and those 5 small ones. There might be white connector which you can pull apart off the board. Wipe down everything. Looking at your screenshot, ideally/regularly they should be parallel. When you take a puff they should both dip/sag equally. No, it's not dangerous, but it should be fixed. Because that % is based on the lowest cell, your mod will give you a weak or check battery much sooner than it should, and stop working.

Thanks, great. Your cell 1 is only at 3.5V. That % is based on the lowest cell. Charge both fully, hopefully externally and try it then.

Show me, like before.

That's one of those relatively rare issues, that even I wouldn't be able to come up with good search terms (but I have seen it a posted here). I'd suggest you open a Help Desk ticket. ⬇️ Link in my signature line. ⬇️ Edit: Thanks for that Device Monitor screenshot with relevant fields enabled 👍

IT WAS NEVER IN TC.

See how in your screenshot near the bottom across from material it shows 'Watts' ? So you were never in TC. If it happens in the future, follow what I said.