Latitude 5550 Owner's Manual

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Power adapter requirements of Latitude 5550 (option 2)

NOTE:If you did not purchase the Dell-branded power adapter that is recommended for your computer, ensure that the power adapter you use meets the following requirements.

The following table lists the power adapter requirements for your Latitude 5550.

Table 1. Power adapter requirementsThe following table lists the power adapter requirements for your Latitude 5550.
Description	Value
Power that is required from a power adapter to achieve optimal performance	100 W
Power that charges the computer at a slower speed NOTE:A warning message may appear informing you about the use of a lower-powered adapter and slower charging speed.	Less than 75 W
Minimum power that is required from a power adapter to operate the computer and charge the battery NOTE:A warning message appears informing you about the use of a lower-powered adapter and slower charging speed.	45 W
USB Power Delivery (PD) fast charging	Supported
ExpressCharge mode	Supported NOTE:Ensure that the computer with a 54 Wh battery is connected to a 100 W power adapter for this feature to be supported. NOTE:ExpressCharge mode must also be enabled in the BIOS Setup screen. Select Power > Battery Configuration > ExpressCharge, then press Enter.