This battery charger can charge one 18650 battery by main voltage
from 100V to 240V. It is compact enough to carry around.
Input Voltage: 100-240V, 47-63Hz.
Charging Current: 1.2V/370mA , 3.6 or 3.7V/320mA
Output Voltage: DC 4.2V.
Price: $2.50