A cigalike device activates through an airflow sensor built into the battery body that detects the pressure change during an inhale and uses that signal to trigger current delivery to the heating coil inside the cartridge automatically. No button initiates this, and no setting controls it, making the inhale itself the only action required to produce vapour from the device during normal use. What Is a Cigalike is a question that often leads directly to how the device works in practice, and draw activation is the defining operational characteristic that separates cigalike devices from button-operated formats across the rechargeable vape category.
Pressure sensor mechanics
Inside the battery body, along the air channel running between the cartridge connection point and the battery base, sits a small pressure sensor. During an inhale, air moves through that channel and creates a localised pressure drop that the sensor reads continuously while the device is in active use.
Activation threshold is calibrated at manufacture to distinguish between ambient air movement near the mouthpiece and a deliberate inhale through it. That calibration is precise enough to ignore gentle breath near the mouthpiece or air movement during transit in a pocket, while remaining sensitive enough to respond to an intentional draw within milliseconds of it starting. Below the threshold, nothing happens.
- Pressure drop inside the channel during an inhale crosses the activation threshold.
- Calibration prevents ambient airflow from triggering the circuit between draws.
- Signal reaches the circuit board within milliseconds of a pressure change being detected.
- No user interaction with the sensor is required at any point during normal daily use.
That calibration stays fixed across the working life of the device without any adjustment from the user at any stage, meaning activation behaviour on the first day of use and activation behaviour twelve months later remain consistent with each other under normal conditions.
Current delivery during a draw
Signal from the sensor closes the circuit between the battery cell and the cartridge contact point. Current travels through the battery terminal into the cartridge base, into the heating coil wound around the wick inside the cartridge, and resistance in the coil wire converts electrical energy into heat. E-liquid drawn up through the wick reaches vaporisation temperature and vapour moves through the narrow air channel toward the mouthpiece.
Output stays fixed across every draw without exception. No variable power, no wattage control, no temperature adjustment sits between the sensor signal and the coil during any draw at any point in the device’s lifespan. Same coil temperature and same vapour volume at the mouthpiece on every draw, from the first puff on a fresh cartridge through to the last puff before that cartridge empties and gets replaced. Consistency without configuration is what fixed output delivers in a cigalike format, and it is a direct result of the sensor-driven design rather than an incidental feature of compact device construction.
Circuit behaviour at rest
Inhale ends. Airflow drops. Pressure differential falls below the activation threshold, and the circuit opens immediately without delay or a timer involved in the cutoff process. Coil temperature drops as soon as current stops because no residual energy continues heating the wire after the circuit opens at the end of a draw.
Between draws, the circuit stays open, and battery charge holds in the cell without passive drain from the heating side of the circuit. Charge level when the device is set down after a draw remains available when it is picked back up, minus only the minimal background self-discharge rate of the lithium-ion cell during idle storage periods. Each charge cycle, therefore, covers more individual draws than it would if the circuit remained partially active between uses, keeping battery efficiency consistent and predictable across the full working life of the device from first charge through to the point where cell capacity eventually reduces through natural ageing of the lithium-ion chemistry.
