First, the technical parameters: 
 1. Battery: 2 AA / AAA Ni-MH battery; computer USB interface, power supply; 
 2. Input port charging voltage: USB5V ± 0.2V; 
 Full charge voltage: 1.45V ± 0.05V / cell; 
 3. Charging current: 500mA ± 50mA; 
 4. Charging indicator: red light when charging, fully charged the red light flash, the two slot independent direction control; 
 5. Charging time: 5H. 
 Second, the charging characteristics: 
 1. For two 5,7 No. (AA / AAA) Ni-MH, Ni-Cd rechargeable batteries; 
 2. Input interface using current-limiting design, drawing current from the PC, the use of safe and reliable; 
 3. Microcontroller technology with Samsung's intelligent charge control, with charging indicator, users do not need to estimate the charging time, when the charging indicator light flashes means that the charging end, and automatically transferred to the trickle charge state. 
 Third, use: 
 1, the two 5 / 7 (AA / AAA) NiMH rechargeable batteries, in accordance with the standard polarity within the battery compartment into the charger; 
 2, the USB charger into a computer USB socket, the red light began to charge; 
 3, intelligent fully charged, the indicator light is flashing, is normal.