D-3004S
4-ch V-mount Battery Charger
◆ V-mount battery charger
◆ 4-ch simultaneous charging
◆ 1-ch discharging
◆ 4-level LED charging indicators for
    each channel

Li-ion charging follows a two-period approach. The first period is constant-current. The battery is charged at the maximum charging rate. When the battery reaches a specified set-point voltage, charging circuits switch to the second period: the constant-voltage period. The charging circuit will provide only enough current to maintain the voltage, to prevent the battery from over charging.

SWIT charger can identify different chemical types of batteries, and provide the correct charging program, to protect the batteries 
from over current, over charging, high temperature, etc.

http://www.swit.cc/productshow.aspx?id=48