Vape tastes burnt after charging

After charging, a burnt smell usually occurs, which usually indicates that the atomizer core (Coil) inside the device has been damaged, and the charging action merely triggered the problem.

Why exactly after charging?
During charging, lithium batteries generate a lot of heat. Since electronic cigarette devices are usually compact, this heat is difficult to dissipate, resulting in two consequences:

Oil becomes thinner: The heat causes the viscosity of the oil to decrease, possibly making it flow too quickly, resulting in uneven oil supply to the atomizer core.

Core damage: If the atomizer core is already aged or has carbon deposits, the heat from charging may cause the residue to char, thereby producing a burnt smell.

In simple terms, the high temperature from charging became the "final straw" that "crushed" the already fragile atomizer core.

 How to identify and solve the problem?
You can follow these steps to troubleshoot, which can also help you determine if the atomizer core can still be saved.

Step 1: Try "first aid"
If your device is adjustable in power or just a new cartridge is installed and you hear a burnt smell, try these methods:

Immediately reduce power: Lower the power by 2-3 watts or adjust the voltage to 3.2V-3.8V. High power is a common cause of the core burning.
Fully "moisten the core": If it's a new cartridge, be sure to drip 3-5 drops of oil into the oil guide hole of the atomizer core and let it sit for 5-10 minutes to allow the cotton to fully absorb the oil.
Let the device "cool down": Remove the charger and wait for at least 5-10 minutes before smoking to allow the internal heat to dissipate.

Try "drawing oil": Without fully pressing the button (or the device not being fully activated), gently take a few short puffs. This helps draw the oil into the atomizer core and expel the bubbles formed during charging.

Step 2: If "first aid" doesn't work, where is the root of the problem?
If the above methods don't work, it indicates that the atomizer core is likely permanently damaged. You can check the table below to see which situation is the most similar:

Possible cause | Specific manifestation and judgment method | Solution
--- | --- | ---
Atomizer core lifespan exhausted | This is the most common situation. Even if the oil is sufficient, the burnt smell persists. One atomizer core usually lasts for 1-2 weeks. | Replace a new cartridge or atomizer core. This is the most direct and effective solution.
Low oil level in the cartridge | Check the cartridge. If the oil is almost empty, it means the oil guide cotton cannot absorb the oil and is constantly drying and burning. | Immediately refill the oil. If the burnt smell has already occurred, the core is usually damaged and needs to be replaced.
Power setting too high | For adjustable power devices, if the wattage is far beyond the recommended range for the atomizer core, it will instantly burn the cotton. | Refer to the recommended wattage range on the atomizer core and gradually lower the power to find the best taste.
Quality issue of the oil | Using high-sugar or low-quality oil can easily form "caramel" residues on the core, accelerating carbon deposits and core coking. | Try replacing with better-quality or lower-sugar oil.
Leaking oil / Condensation liquid | Oil leaks into the internal circuit or the cartridge accumulates too much condensation liquid. When heated during charging, it gets charred and produces an odor. | Clean the inside of the device and the bottom contacts of the cartridge, and try to expel the condensation liquid in the cartridge.
Summary and prevention
Once the atomizer core is burnt, the burnt smell cannot be completely removed through cleaning because the structure of the cotton and the coil has been damaged. The most thorough solution is to replace it.

To prevent this problem, you can develop a few simple habits:

Maintain sufficient oil: Don't wait until the oil is completely used up to add more.

New core must be moistened: After replacing a new cartridge, be sure to drip oil, let it sit for 5-10 minutes before using.

Avoid "continuous smoking": Continuous smoking allows the core to not have time to absorb oil, easily causing dry burning.

Wait a little after charging: Remove the power source and let the device sit for a few minutes before using.