5 Pack original SLB dse901 battery promotion. there are two color for choice:

BLACK and WHITE-----black body with blue led, white body with red led.

Please tell us your color choice, otherwise we send you default BLACK ones.

The battery of an electronic cigarette is the brain of the device. Inside each battery is a microprocessor and switch that controls the power to the atomizer. When a user inhales on the device, the switch in the battery turns on and allows the vaporizer to run, after the user is done inhaling the processor/switch will put the device automatically into stand by mode and wait for the user to inhale again.