Features: Effortlessly build your own high capacity power banks with this 4x18650 battery holder set, featuring easy assembly and double USB outputs for simultaneous device charging. Engineered with plug and play connectors and a bright LCD power display, this ABS charging case securely houses replaceable 18650 batteries while monitoring real time power levels. Ideal for enthusiasts, travelers, and outdoor adventurers seeking customizable power solution without complex wiring or technical expertise. Perfect for camping trips, emergencies backup, or daily commutes where on the go charging for smartphones, tablets, and gadgets is essential. The shock resistant ABS construction and precisions PCB design ensures long lasting performances, making this modulars battery pack a versatile energy companion for multiple devices. Specifications: Component: ABS+PCB Size: Approx. 4.53x3.23inch(115x82mm) Weight: 90g Color: White/Black/Red/Blue Package Includes: 1x Mobile Power Boxes Cover note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.