How to find the wattage of your deviceUpdated a year ago

To get your device's power consumption, contact the manufacturer directly or find it yourself by looking at the power adaptor's (charger) Tech Specs. If the Tech Specs don't give you the wattage but only voltage and amperage, just multiply them to get the wattage: 

    Voltage x Amperage = Wattage

Take Lenovo Thinkpad X1 Carbon, for example, on its power adaptor, it says 'OUTPUT: 20V  2.25A'. Use the equation above to calculate Lenovo Thinkpad X1 Carbon's power consumption: 

    20V x 2.25A = 45W, which is workable with all Omnicharge devices.

Note: Your laptop charger's output specification indicates the highest wattage it can produce when your computer is under heavy load. Typically, your charger won't need to output this much power.