DIY Power Bank Case – 2x 18650 Batteries, 6000mAh, USB-C + USB-A, 5V/2A Input & Output, Portable Charger Shell, Black/White – Batteries Not Included

This compact DIY power bank shell supports 1 to 2 standard 3.7V 18650 lithium batteries (not included) for a total capacity of up to 6000mAh, with 5V/2A USB-C input and USB-A output, reverse polarity protection, plug-and-play charging, over 500 charge cycles, and a lightweight portable design (43 x 23 x 100mm) compatible with smartphones and other USB-charged devices — available in Black and White.