Dell Thunderbolt Dock WD22TB4 User Guide

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Dell ExpressCharge and ExpressCharge Boost overview

Dell ExpressCharge enables an empty battery to charge to 80% in about one hour when the system is turned off and to 100% in approximately two hours.
Dell ExpressCharge Boost enables an empty battery to charge to 35% in 15 minutes.
Metrics are created for system off given charge time with the system on has varied results.
Customers must enable ExpressCharge mode in the BIOS or through Dell Power Manager to take advantage of these features.
Check your Dell Latitude, XPS or Precision system for the battery size using the table to determine compatibility.

Table 1. Dell ExpressCharge compatibilityThe following table provides the Dell ExpressCharge and ExpressCharge Boost overview specifications of your docking station:
Power Delivery to System	Max Battery Size for ExpressCharge	Max Battery Size for ExpressCharge Boost
90 W with 130 W adapter	92 Whr	53 Whr
130 W with 180 W adapter	100 Whr	76 Whr