General description This 18650 Rechargeable Battery USB Charger is designed for efficient charging of various battery types, including 18650 3.7V lithium and 1.2V Ni-AA/AAA batteries. It features built-in safety mechanisms to prevent overcharging, overheating, and short-circuiting, ensuring the safety of both the charger and your batteries. The intelligent LCD display provides real-time updates on charging status and battery levels, making it user-friendly and reliable. Technical specifications Input: 5V Line length: 55CM Plug specifications: USB interface Charging time: 1-8 hours Output: 4.2V-2A (for 3.7V lithium battery), 1.5V-1A (for 1.2V AA/AAA batteries), 9V/9.8V-1A (for 9V nickel hydrogen battery) Charging indicator: Standby display for slots 1 to 2 is 4.2V; charging display shows battery voltage; slots 3 to 7 indicate standby with a green light, charging with a red light, and fully charged with a green light. Color: Silver Material: ABS Measurement allowed error: +/- 1-3cm