20000mah Power Bank Case Bigmax With Circuit Board – 22.5W Fast Charging | 3.7V 20000mAh Polymer Battery Support | Type-C PD + Dual USB | Display | Black & White

Specification:
Battery Type: Supports 2 × 3.7V Li-Po Polymer Batteries (20000mAh recommended)
Output Ports: 2 × USB-A (22.5W max), 1 × Type-C PD (in/out)
Input Ports: Micro USB & Type-C
Display: LED digital screen (battery percentage)
Fast Charging Protocols: PD 20W / QC 3.0 / SCP / FCP
Output Voltage: 5V/9V/12V
Circuit Protection: Over-voltage, over-current, and short-circuit protection
Shell Material: Durable ABS plastic
Color Options: Black / White
Dimensions: Approx. 145 × 70 × 27 mm
Weight: Approx. 100g (without battery)
Description:
This power bank DIY case is specially designed to work with two 3.7V polymer batteries (not included) to create a compact and powerful 20000mAh-class fast charger. It supports modern fast-charging standards through dual USB and Type-C ports and features a digital display for easy monitoring. Ideal for custom power solutions.

Application:
DIY power bank with polymer battery
Fast-charging solution for mobile devices
Project builds and portable charging kits
Backup power for travel and outdoor use
Power bank business or resale with own battery setup