DIY 20000mAh Dual USB Power Bank Case Kit – For 4x 18650 Batteries (Charger Box For Phone)

Build your own massive power bank with this DIY case kit!

It's designed to hold four standard 18650 batteries (batteries not included) to create a 20000mAh portable charger.

The case itself has dual USB ports, so you can charge two devices at once.

It's a simple project—just drop in your own 18650 cells, close the case, and you've got a high-capacity battery pack for your phone, tablet, or any USB device.

The cases come in a few colors: black, white, blue, and pink.

They're made from plastic and are unbranded, but they're a fun, practical project for anyone who likes to tinker.

Perfect for camping, travel, or just having backup power on the go.

Made in China.