Hello all fellow vapers. Let me first start off by saying that I am very pleased with the Cuboid. The build quality is just excellent and I have have not smoked a single cigarette since the start. I bought this device back in April and have been vaping steady since. It is also very nice to see that Joyetech is keeping up with updates and adding new features - kudos to Joyetech!. I have recently run into a couple of problems with the device lately though, that almost got me to a point where I wanted to toss out my cuboid and I actually thought about picking up old habits again - just to get my "fix". I will go into details.
CURRENT SETUP:
Cuboid 150w (hardware version 1.01)
Uwell crown tank
Uwell RBA
26ga SS316L stainless steel coil (vertical) (5 wraps)
LG 18650HG2 3000mAh High Discharge 18650 batteries (married)
CUBOID SETTINGS:
TCR VALUE : 108
Heat : 200C
Watts : 20 (locked)
Coil resistance : 0.36
I started off using the stock coils that came with the Uwell crown when I first got the Cuboid (still on stock firmware). These worked out just fine but as i read more into building coils myself, I wanted to try wicking my own coils and bought the uwell RBA coil. The building was fairly easy and so i started building vertical coils instead of vertical coils in the RBA and the vape and taste was just pure heaven!. I started playing with TCR mode and found the perfect value. I really like that you can easily update the firmware on the Cuboid and I gotta hand it to Joyetech for the support part. They still support the Cuboid by releasing firmwares with new features. And at some time I downloaded one of the more recent firmwares. This is where this pleasant experience ends.
I downloaded and flashed the 3.03 firmware and thought nothing of it. At first i did not notice any difference. But after a while I suddenly noticed that the "Protection" kicked in all the time and the wattage jumped very low around 2-5-8-1-2. There was very little vapor and I experienced alot of dry hits and the taste was just awful. yuck!. And so I tried adjusting the temperature higher and higher to gain a more powerful hit. That helped a little but now the cotton burned out alot faster and i was left with that burnt, dry and awful taste. But still, the protection kicked in all the time. Okay so I thought that i must be doing this all wrong somewhere and ended ripping the tank apart and cleaned it thoroughly. Put it all back together, created a new coil, dry burned the coil a little and tucked in new cotton and built it back together. Juiced it up and started slow at a low wattage and gradually working my way back to the normal temps. Still the "protection" appeared and at a low wattage mode. It was like this a couple of weeks and as i was getting more and more impatient with the setup and my craving for a good vape, it almost tipped me over to going back to old habits. I was now experiencing no juice taste at all (vapors tongue). I though to myself that I have done something to the device that is causing this. perhaps damage to the internal electronics due to a leakage of some kind or a bad connection between the tank and the Cuboid. Then Joyetech released a new firmware and I thought yay this issue is probably fixed now so I tried out the new firmware (5.14). There was no change to my surprise and so i thought i should just give up.
A couple of days later my buddy received a new Cuboid with the same tank and RBA as me. He had tried out my device when it was working properly and he wanted to quit smoking too. We moved the Uwell tank from my device to his and bang! working perfect! perfect clouds and a wonderful taste spot on!. So i went "what the hell!?". And then it hit me. I did update the Cuboid firmware on my device from 3.02 to 3.03 some time earlier. So i downloaded the 3.02 firmware and flashed it back to my Cuboid. Set up the TCR values again and puffed away. WOW! working perfect again. So none of the firmware released after 3.02 was working out for me. I tested flashing the 3.03 firmware my buddy's Cuboid with his crown tank and the exact same problem appeared. A couple of things i noticed also:
* The batteries are draining themselves in the 5.04 and 5.14 firmware (have not tested with the earlier ones). Even if the Cuboid is powered off.
* Charging over USB seems slower in the 5.04 and 5.14 firmware (although it is not recommended to charge this way!)
* The Cuboid is generating alot more heat in the 3.03fw and higher (don't know if this has something to do with the protect mode kicking in) and so the batteries are drained quicker when vaping.
* Power and temp ss316 mode is working fine in both old and new firmwares
I guess the Cuboid mini and the eVIC devices could also have these issues if the firmwares are similar but I have now tried this. Please comment if you have experience the same thing or if it's just me and my setup that is incompatible with these new firmwares. Perhaps this is something Joyetech could look into.
Conclusion : The device is working perfect on 3.02 firmware.
CURRENT SETUP:
Cuboid 150w (hardware version 1.01)
Uwell crown tank
Uwell RBA
26ga SS316L stainless steel coil (vertical) (5 wraps)
LG 18650HG2 3000mAh High Discharge 18650 batteries (married)
CUBOID SETTINGS:
TCR VALUE : 108
Heat : 200C
Watts : 20 (locked)
Coil resistance : 0.36
I started off using the stock coils that came with the Uwell crown when I first got the Cuboid (still on stock firmware). These worked out just fine but as i read more into building coils myself, I wanted to try wicking my own coils and bought the uwell RBA coil. The building was fairly easy and so i started building vertical coils instead of vertical coils in the RBA and the vape and taste was just pure heaven!. I started playing with TCR mode and found the perfect value. I really like that you can easily update the firmware on the Cuboid and I gotta hand it to Joyetech for the support part. They still support the Cuboid by releasing firmwares with new features. And at some time I downloaded one of the more recent firmwares. This is where this pleasant experience ends.
I downloaded and flashed the 3.03 firmware and thought nothing of it. At first i did not notice any difference. But after a while I suddenly noticed that the "Protection" kicked in all the time and the wattage jumped very low around 2-5-8-1-2. There was very little vapor and I experienced alot of dry hits and the taste was just awful. yuck!. And so I tried adjusting the temperature higher and higher to gain a more powerful hit. That helped a little but now the cotton burned out alot faster and i was left with that burnt, dry and awful taste. But still, the protection kicked in all the time. Okay so I thought that i must be doing this all wrong somewhere and ended ripping the tank apart and cleaned it thoroughly. Put it all back together, created a new coil, dry burned the coil a little and tucked in new cotton and built it back together. Juiced it up and started slow at a low wattage and gradually working my way back to the normal temps. Still the "protection" appeared and at a low wattage mode. It was like this a couple of weeks and as i was getting more and more impatient with the setup and my craving for a good vape, it almost tipped me over to going back to old habits. I was now experiencing no juice taste at all (vapors tongue). I though to myself that I have done something to the device that is causing this. perhaps damage to the internal electronics due to a leakage of some kind or a bad connection between the tank and the Cuboid. Then Joyetech released a new firmware and I thought yay this issue is probably fixed now so I tried out the new firmware (5.14). There was no change to my surprise and so i thought i should just give up.
A couple of days later my buddy received a new Cuboid with the same tank and RBA as me. He had tried out my device when it was working properly and he wanted to quit smoking too. We moved the Uwell tank from my device to his and bang! working perfect! perfect clouds and a wonderful taste spot on!. So i went "what the hell!?". And then it hit me. I did update the Cuboid firmware on my device from 3.02 to 3.03 some time earlier. So i downloaded the 3.02 firmware and flashed it back to my Cuboid. Set up the TCR values again and puffed away. WOW! working perfect again. So none of the firmware released after 3.02 was working out for me. I tested flashing the 3.03 firmware my buddy's Cuboid with his crown tank and the exact same problem appeared. A couple of things i noticed also:
* The batteries are draining themselves in the 5.04 and 5.14 firmware (have not tested with the earlier ones). Even if the Cuboid is powered off.
* Charging over USB seems slower in the 5.04 and 5.14 firmware (although it is not recommended to charge this way!)
* The Cuboid is generating alot more heat in the 3.03fw and higher (don't know if this has something to do with the protect mode kicking in) and so the batteries are drained quicker when vaping.
* Power and temp ss316 mode is working fine in both old and new firmwares
I guess the Cuboid mini and the eVIC devices could also have these issues if the firmwares are similar but I have now tried this. Please comment if you have experience the same thing or if it's just me and my setup that is incompatible with these new firmwares. Perhaps this is something Joyetech could look into.
Conclusion : The device is working perfect on 3.02 firmware.