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DEWALT Battery Charger and USB Wall Charging Kit, For 20V and 60V Dewalt Batteries, Charge Devices Up To 100 W With USB-C Port or 12 W Using USB-A Port (DCB094K) - Amazon.com
USB Battery Pack - 2200 mAh Capacity - 5V 1A Output : ID 1959 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Jump Starter Power Bank - Portable Battery Charger With USB C Charging - AC56789 | Type S Auto
Simple USB Battery Charger Circuit
MicroUSB Battery Holder (3xAA) | The Pi Hut
Best High Capacity USB-C Battery Packs - MacRumors