Introducing our 21700 Power Bank Case, the ultimate solution for on-the-go charging. This DIY battery holder is designed to accommodate 4 flat 21700 lithium batteries (not included), offering flexibility and convenience. With an intelligent LED large screen display, you can effortlessly monitor the remaining power status. The high strength transparent shell not only adds a touch of elegance but also ensures durability. Equipped with a PD20W fast charging output port, it is compatible with various cell phones and tablets, making it the perfect portable charger for your devices. Please note that the batteries are not included. Elevate your charging experience with our 21700 Power Bank Case today!
