https://sellout.woot.com/offers/baseus-20000mah-laptop-portable-charger-9 Baseus 20000mAh Blade 100W USB-C PD 3.0 Slim Power Bank (2x USB-C, 2x USB-A) on sale for $39.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.