diymore 2-Cell 18650 Battery Case Solderless Power Bank Kit with Type-C Bidirectional Charging

ParameterBattery Type: 3.7V 18650 battery (flat-top, without protection board, internal resistance below 40 mΩ, 1C discharge rate, voltage per cell must be between 3.3-4.2V. Do not use pointed-top batteries. Modifications or use of non-compliant batteries are strictly prohibited!)Output: 5V/0.1-2.4AInput: 5V/0.1-2AInterface: Type-C portColors: Black, White, YellowButton: Single click displays battery level; long press activates LED lightBattery Indication: 4-level LED display, cold-cathode digital screen, intelligent auto-shutdown when inactiveKey Features: Reverse-installation protection on the mainboard prevents damage if batteries are inserted incorrectly. Reinserting correctly restores functionality. However, never connect damaged batteries with mixed polarities (e.g., positive and negative terminals) or severely degraded batteries, as this may cause direct short circuits and burn the spring.Important Notes1. The spring clip is positive (+), the spring is negative (-). Insert correctly. Never connect positive and negative together, as this will burn the spring and destroy the product!2. Product includes only the shell and motherboard (solderless type). Batteries are not included.Package includeShell Kit1Type-C Cable1