You'll wonder how you ever spent so much time plugged into the wall. Together with the 18W PowerIQ 2.0 USB port, you can now charge virtually any phone or tablet at high-speed. (Compatible with Qualcomm Quick Charge) Premium Design With a sleek matte exterior and cool-blue LED light-wheel to display battery level, PowerCore Essential 20000 PD is premium both inside and out. Trickle-Charging Mode Trickle charging is designed to provide optimized charging to low-power devices such as earphones, Bluetooth speakers, and other accessories. To activate, press the power button twice or press and hold for 2 seconds until the LED indicator turns green. Compatibility: Compatible with iPhone XS / XS Max / XR, Android smartphones and tablets (including the Nexus 7), and other USB devices. Note: USB-A to USB-C cable, Lightning cable, and AC adapter not included. When the trickle-charging mode is on, the last LED light will remain green, regardless of battery status. Recharging via USB-A charger will take approximately 20 hours. When charging an iPad, make sure the portable charger has at least 2 LEDs illuminated, otherwise charging speed will be greatly reduced.