How to make a disposable work after it dies?

When the disposable electronic cigarette runs out of power, the solution depends entirely on whether your device has a charging port.

Case 1: Has a charging port (USB-C / Micro-USB)
This is the most common and safest solution. Many large-capacity disposable electronic cigarettes are designed with charging ports, and when the battery runs out, it can be charged like a mobile phone.

Find the charging port: Check the bottom or side of the device, usually there is a USB-C or Micro-USB interface covered by a rubber plug.

Use the appropriate charging cable: Prepare a matching charging cable and insert it into the charging port.

Connect to a low-power power source: Connect the other end of the charging cable to a computer USB port, a power bank, or a 5V/1A low-power charging head. Do not use a fast charging head for mobile phones, as high power may damage the battery.

Wait and observe: Charging usually takes 30-60 minutes. Observe the indicator light. When it changes color, stays on, or goes off, pull out the power source immediately upon seeing the signal.

Try using: After pulling out the power source, take a short puff to test.

Case 2: No charging port
If there is no charging port on the device, it is a truly one-time product. The battery's power is designed to be depleted to burn the e-liquid.

For this type of device, there is no safe "resurrection" method. Online tutorials such as disassembling and directly connecting the battery to charge are extremely risky and may cause battery short circuits, leakage, fire, or even explosion. The safest approach is to properly discard it and purchase a new one.

 Case 3: Out of power, but still has some e-liquid (for devices with charging ports)
If your device has a charging port but runs out of power after a few puffs, or feels that the battery is quickly depleting, this is usually not a battery issue but rather that the e-liquid has almost been exhausted.

The lifespan of disposable electronic cigarettes is determined by both battery power and e-liquid storage. When the battery runs out, the e-liquid is usually almost depleted. Forcing a depleted battery to continue working can easily lead to dry burning, producing a burnt smell. At this point, the most sensible choice is to replace it with a new one.

Summary
With a charging port: This is the only officially designed way to use it. Correct charging will suffice.

Without a charging port: The device's lifespan has ended. Do not attempt any "resurrection" operations. Simply replace the device with a new one.