The Aspire CF Battery series are high-end e-cigarette power systems. This battery series features stainless steel endpoints, a metal button, and a carbon fiber coated tube. The Aspire CF Batteries contain a revolutionary spring connector. This unique technology ensures that there will always be a strong connection between the battery and e-cigarette tank. The structural design and control circuit of this battery series makes using it extremely reliable and stable.
Turn ON/OFF - Press button 5 times in succession in 2 seconds. The LED will blink 3 times (both blue and orange lights) and the button will illuminate Blue when active and ON.
Repeat this procedure to turn battery OFF.
Usage - Press the LED button and inhale at the same time.
LED Light Indicator - Blue LED light will display for battery cell voltage of 3.5-4.2V. The Orange LED indicates a voltage less than 3.5V.
Output Voltage - 4.2V full power output.
Special Characteristic - 3.3V-4.8V output variable voltage.
Rotate the rotary knob at the bottom of the battery to deliver the optimal voltage.
Low Battery Indication - The battery Orange indicator light blinks 15 times.
More features explained: http://www.aspirecig.com/products/aspire-cf-battery-series/cf-battery-149.html