Anker 20000 mAh Power Bank  (Black, Lithium-ion, for Laptop)

PowerCore Speed 20000 PD: The Ultra-High Capacity Portable Charger with Power Delivery! Power Delivery: Unlike a lot of USB-C portable chargers, PowerCore Speed PD series delivers full power delivery support at 22.5W. Charges USB-C MacBooks and all other Power Delivery devices (USB-C to Lightning cable required for iPhone 8)! High-Speed Input: One of the first portable chargers to support Power Delivery input. An enormous 30W input allows a full recharge in just 4 hours, making it possibly the fastest recharging portable charger available. Note, using a non-PD charger will take up to 20 hours! Ultra-High Capacity: With a capacity of 20100mAh, PowerCore Speed charges a typical phone 6 times without needing a recharge! Notes: -USB-C Laptops which require an input over 22W may not be supported! -USB-C MacBooks are tested compatible! -Not compatible with devices with an input below 50mA (e.g. some Bluetooth headsets and GPS devices)! -Incompatible with HTC 10, HP Spectre and Dell XPS laptops, as well as Lenovo ThinkPad 470s, ThinkPad X1, and Huawei MateBook! -Does not support high-speed charging for MacBook Pro, Samsung W700, Lumia 950, or Motorola Z Force Droid Edition.