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The eCom Supreme is a 2200mAh high-magnification 18650 battery with the standard 510 thread. It features an OLED display with the resolution ratio of 128*32 pixels, showing the atomizer resistance, output voltage and wattage, dump energy, as well as how many puffs you've taken. Also, you can adjust the voltage and wattage through turning the tail regulation ring of the battery.
Standard Configuration:

1* eCom Supreme Battery
1* eGo Adaptor
1* Manual & Warranty Card
Specification

Battery: 19mmX127.5mm
Output wattage: 30W max
Output Voltage: 8V max
Supportive Atomizer Head resistance: 0.5ohm min
Capacity: 2200mAh
Output mode: VV Mode & VW Mode
Color: Black, Silver

eGo Adaptor: 19mm*12.5mm




Optimun working voltage/wattage range:
Amazing output wattage

Such 30W (8V )output will suit most of your needs and enthusiasts!
Mode selection
When the device is in power-on state, press the bottom for 3 times to finish the mode selection between VV mode and VW mode.
Votage/Wattage Adjustment

Rotate the regulation ring clockwise to decrease the voltage/wattage(to increase the voltage/wattage in counterclock- wise direction). The real-time voltage(V)/wattage(W)will be displayed on OLED screen.
Intelligent OLED Screen

Any change of vapor data will display on the intelligent screen, along with the protection alarms.
Charging
Plug the USB cable to the eCom Supreme, and connect it to the wall adaptor or other power source such as a computer. (it can be used whilst on charge)
It takes about 3 hours to fully charge the eCom Supreme through the 1A USB Cable and about 5 hours through 0.5A USB Cable.