Features: DIY Rechargeable 4slot 18650 battery case enables powerbank assembly with no soldering required, featuring swappable flat top battery slots for easy maintenance and capacity upgrades. Builts with durability ABS plastic and integrated digital display, this portable charging adapters supports real time power monitoring while ensuring secure battery alignment through polarity markeds connectors. Ideal for enthusiasts and DIYers seek customizable, user serviceable portable charging solution. Reliably charge smartphones and tablets during outdoor activity, business trip, or emergency power outages with this compactly powerbanks shell. durability ABS plastic construction secure houses unprotected flat top 18650 batteries (not included) in precise alignment for optimal electrical contact. Specifications: Component:Plastic Size:Approx.11.5x8x2.50cm/4.53x3.15x0.98inch 6Option Type; USB A Output:5V/3A 9V/2A 12V/1.5A 10V/2.25A TYPE C Output: 5V/3A 9V/2.2A 12V/1.67A 10V/2.25A TYPE C Output:5V/3A 9V/2A 12V/1.5A Standard version:10W/5V2A, Fast charging version:22.5W;Support QC3.0/QC2.0 for 4pcs 18650 lithiums batteries can be assembled into a portable mobile power supply to provide power for mobile phones, tablets, electronic devices;(Battery not included) Package Includes: 1pc DIY Battery Case note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.