The YLL 3.0 is a portable induction heater designed for Thermal Extraction Devices (TEDs), offering adjustable power output from 30W to 100W. Compared to earlier YLL models, the 3.0 introduces a larger induction coil, adjustable chamber depth, replaceable glass-lined heating chamber, and improved long-term battery management aimed at heavy daily use.
The device is built around dual removable 21700 batteries and can operate either as a portable induction heater or as a semi-desktop unit while plugged in via USB-C.
Manufacturer’s claims:
Adjustable power range from 30W–100W
Custom firmware with desktop mode support
Battery charging capped at 70% during plug-in operation to reduce degradation
Larger induction coil compatible with most TEDs
Adjustable heating depth system
Replaceable glass-lined chamber
180° rotating display
Portable and desktop-style functionality in one unit
Confirmed specs:
Power range: 30W–100W
Battery configuration: Dual 21700 (not included)
Charging: USB-C
Dimensions: 136 × 67 × 41mm
Weight: ~300g without batteries
Heating chamber: Depth adjustable
Coil size: Enlarged design for broader TED compatibility
Display: 180° flippable screen
Warranty: 1 year
Recommended batteries:
Molicel P42A
Molicel P45B
Molicel P50B
Fogstar Energy 4000 21700
What’s included:
1 × YLL IH 3.0 device
1 × Replacement glass tube
1 × Replacement ceramic insert
1 × USB-C charging cable
Compatibility:
Compatible with most Thermal Extraction Devices (TEDs)
Designed for both portable and desktop-style use
Works with devices requiring larger induction coils
Suitable for battery-powered or plugged-in operation
Replaceable chamber components for easier maintenance and longevity
Additional notes:
Devices sold by Madheaters come with a Customfirmware preinstalled that offers Desktopmode, which limits charging to 70% to significantly reduce battery degradation
The YLL 3.0 is also sold under alternative branding in some regions, most notably as the Cuboo Induction Heater XL.
Hardware and feature sets appear largely identical between the YLL 3.0 and Cuboo-branded XL versions, depending on retailer configuration and included accessories.
It is the overcurrent error. I keep it plugged in all the time. I have the Mad Heaters version. So the batteries are always topped off. It was ever an issue before but I’ll try lowering it in slowly and see if maybe the depth is too low. Thanks!
It isn’t turning on tho but I suspect that is due to new batteries? I have it plugged in via usb c and there is no charge indicator light and I still can’t turn it on.
Is this normal? How long does it take the charge enough to turn on?
Thanks!
Edit : sorry! I’m a dummy. My eyes are awful and one of the batteries was just the wrong way around lol
My first YLL IH 3.0, which I bought about a year ago, had an overcurrent problem. I solved it by adjusting the depth. The two YLL IH 3.0 units I bought more recently did not have this issue.
However, one of the newer units would not turn on at all. The batteries were not the problem, as the same batteries worked perfectly in my other YLL IH 3.0.
I then connected the USB cable from my Tafée Bowle 1 while leaving the batteries inside the YLL. After that, the device suddenly came back to life and worked normally. I am not sure why, but this particular Tafée USB cable has also revived several other devices. Perhaps it establishes a more reliable USB connection or somehow resets or activates the device’s electronics.
My 3.0 just stopped turning on out of nowhere. Was working completely fine and then an hour later completely unresponsive to anything. Checked Reddit and there are a ton of stories like this, good lord. Think this product may be incredibly poorly-made tbh
As mentioned above, I had a similar problem. Try connecting the YLL IH 3.0 to the power outlet with the batteries inserted. Maybe it will help you also.
lol