CulCharge 3-in-1 Powerbank is the battery charger that fits on your keyring - Tech Guide
CulCharge: Smallest USB charge & data cable | Indiegogo
Cul Charge 2Go Powerbank USB-C to USB Cable Wireless Chargi - Bardejov | Bazoš.sk
Tripp Lite Portable Charger - 2x USB-A, USB-C with PD Charging, 20,100mAh Power Bank, Lithium-Ion, USB-IF, Black power - UPB-20K0-2U1C - Office Basics - CDW.com
Lenovo Go USB-C Laptop Power Bank (20000 mAh) | Lenovo US
Monoprice 2-Port 10,050mAh Power Bank USB Charger, Up to 3A Output For iPhone Android And Galaxy Devices, Power Delivery Input And Output - Walmart.com