CulCharge 3-in-1 Powerbank is the battery charger that fits on your keyring - Tech Guide
Culcharge
Culcharge
CulCharge PowerBank 2:GO USB-C
Keep your phone going with the CulCharge keychain powerbank - The Gadgeteer
18W USB C Portable Charger for Surface Go, Nintendo Switch and more – J-Go Tech
Cul Charge 2Go Powerbank USB-C to USB Cable Wireless Chargi - Bardejov | Bazoš.sk
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