1. the charger can charge four AA / AAA / C / D-type or two 6F22 (9V) NiMH or NiCd rechargeable batteries; 2. a small constant current charging mode, will increase battery life; 3,.each channel with independent charge mode, the corresponding LED indicate charging status. Third, the electrical parameters 1. input: 220V AC, 50Hz; (depending on voltage transformers voltage) 2. Output: 1.2VDC * 4 150mA, 9VDC * 2 25mA; 3. no-load power consumption: 1.5W MAX; 4. fully loaded power consumption: 4.5W MAX; 5. the battery charge rate: ≥ 80%; The environmental conditions 1. the use of the environment: Temperature :0-35 ℃ Humidity: ≤ 95% 2. the storage environment: Temperature: -25 ~ 60 ℃ Humidity: ≤ 85% 3. when the body temperature of work: charging shell surface temperature ≤ 60 ℃, battery surface temperature ≤ 55 ℃.