Power Bank Case For 3 USB 3x 18650 Battery Charger Box Random Colour

Quantity: 1-PCS DIY 3×18650 Battery Power Bank Case with 3 USB Ports Battery Configuration: Holds 3 x 18650 lithium-ion batteries (batteries not included) USB Ports: 3 output USB-A Output Voltage: 5V DC (standard USB output) Output Current: Up to 2.1A per USB port (combined maximum output varies) Input Voltage: DC 5V (charging the power bank) Charging Circuit: Built-in charging controller with overcharge and over-discharge protection Material: Durable ABS plastic shell with metal contacts for secure connections Dimensions: Approx. 100mm x 60mm x 25mm (varies by design) Weight: Approximately 150-200 grams (varies by design) Compatibility: Compatible with standard 18650 cells (protected or unprotected) Features: On/Off switch, battery level indicator LED, and USB charging port for recharging