Portable 5V 6x18650 Power Bank Battery Box Shell Case DIY Type-C Micro USB Fast Charging Mobile Phone Charger Box Case.
 
The Portable 5V 6x18650 Power Bank Battery Box Shell Case is a do-it-yourself (DIY) housing kit that lets you build a custom high-capacity power bank using six 18650 lithium-ion cells (batteries not included).
 
Key Specifications & Features
Battery Capacity: Holds up to 6 x 18650 flat-top or button-top lithium-ion cells, commonly yielding up to 20,000 mAh depending on the cell capacity you install.
Input Ports: Typically includes Micro-USB and Type-C input ports for recharging the power bank.
Output Ports: Features Dual USB-A output ports (plus Type-C support on select models) to charge up to two devices at once.
Power Output: Standard 5V/2A output on basic models, with upgraded versions supporting fast-charging protocols (such as PD or QC up to 22.5W).
Display / Indicators: Many variants feature an LCD digital display to monitor real-time battery percentage, voltage, and current, or simple LED indicator lights.
Safety Features: Built-in protection board with anti-reverse polarity safeguards (on select controller boards) to prevent damage from improperly inserted cells.
Build Type: Solder-free snap-on or screw-secured plastic/leather-textured shell designed for easy assembly