Amazon deal of the day, same price as Clear's deal in November. Some info thanks to Clear:
The 26800mAh (SW30 Pro) has multiple fast charging technologies including 18W USB-PD via USB-C, Quick Charge 3.0 via the blue USB port and 5V/2.1A via the white USB port. For recharging they have USB-PD via USB-C, QC 3.0 via Micro USB and and 5V/2.1A via Lightning. Other fast charging technologies supported include Huawei FCP, Samsung AFC (excl. S9/S10), QC2.0, MTK PE and Apple 2.4A. They both support pass-through charging.
The Sense 4 Mini is also available for $16.50 for anyone interested in that. It's standard charging (5V/2.1A), no 18W fast charging.
Ends at midnight or when sold out.