So back around May of this year my girlfriend and I each grabbed a Kaos Spectrum to use for our main mods and while they were amazing for the first couple of months, they've steadily gone downhill. We have them paired with the GeekVape Avocado 24 running dual coils at around .15-.20 with 26 AWG twisted SS with a pair of IMREN 18650 for each.
Now I carry mine everywhere and have it on my person pretty much 100% of the time, while she babies it and still has it looking like it did the day it came out of the box. Back around July I was using mine with no issues, adjusted my wattage, sat it down and left it for about 5 minutes. When I picked it back up and hit the fire button, my whole screen was cracked. While I use it constantly, I've never dropped it or hit it on anything, but right over the resistance and battery info was a bright white spot with black spiderwebbing over the rest of the screen. As one can expect, over time the amount of visible screen has reduced and on a good day I can only make out the first digit of the wattage setting. Aside from that, at least it still fires and I can adjust my setting by counting them amount of times I have to click until the first digit changes.
As for my girlfriends, yesterday she called me at work and asked if I could take a look at her mod when I got home because it had randomly shut off on her. I was a little confused because even if the batteries were somehow imbalanced (which would surprise me since we each have a married set that we dedicate to these) or if the coil was shorting, I was pretty sure that she would get a notification, not have the mod shut off completely. After taking a look at it when I got home, everything appeared normal, so I popped in a different set of batteries (married as well) and let her do her thing. About 45 seconds later it cut off again would not come back on. I decided to try plugging it in to see if that would make a difference (we've never used USB charging for either since we have an external charger). The Sigelei logo came right up and it kicked up like it should. Thinking that all was good, removed the charger just to have it immediately shut back off. I've tried to update the firmware in hopes that it might resolve it, but the SGLvape app won't recognize it (I've tried all the recommended things like holding the power button while plugging it in after removing the batteries) and am pretty much at a loss as to what to try next.
Another smaller issue we've had with both since we took them out of the box is the battery indicator. When it sits in standby mode, the battery will read at 100%, when you hit fire it'll drop down to around 70% or so and continues to do that as the battery actually drops in charge reflecting a lower and lower number while firing. I always assumed it had something to do with the wattage it was set on reflecting the battery draining faster, but we generally keep them between 50-60W at all times.
All in all, when these things worked like new, they were awesome. The color changing LED was a neat little gimmick, it felt good in the hand even if the faux leather back felt kinda of lacking and the weight with batteries in with was spot on. Our battery doors are still secure and the buttons never even really rattled like some people complained of. If only the functionality of the more important features like the screen and ability to turn on held up.
TL;DR
Own 2, one has a broken screen and the other doesn't even turn on anymore, won't even recognize for firmware update and battery meter reads weird.
If anyone has any recommendations on solving any of these issues, I'd love to hear them. Other than that, I'm going to call Sigelei customer service on Monday and pray for a real response.