Photogenic Professional Lighting AKB-1 Battery - Manual (Page 4)

Control Panel Layout.
Charging the battery.
The battery pack becomes the charger when you connect the AC/DC wall
adapter included in the package.
Before using the battery for the first time, it must be charged
for a minimum of three hours.
Charging Procedures.
1. Turn the main On/Off switch to the ON position.
2. Plug the adapter into the battery and then into the wall.
3. Turn the Flash/Charge switch to CHARGE.
a. The red charge indicator light will turn on indicating the
charging circuit is working.
b. The green charging light will turn on indicating energy is
being replaced in the battery cells. You may notice the pack
becomes warm during this process, this is normal.
4. When the pack is fully charged, the green charging light will begin to
blink (instead of remaining constant) which indicates the charging
cycle is complete.
5. Disconnect the charging adapter and move the flash/charge switch
to FLASH.
There are three green and one red battery power indication lamps on
the control panel. When you turn the battery switch on after a full
charge, all three green LED lamps should be illuminated. As you use the
stored battery power fewer green lights will be lit until you have drained
the battery at which time the red indicator lamp will come on and the
battery should then be recharged.