Battery Tender Blinking Green. Start blinking green light. This may mean the battery already has a full charge.

Battery Tender is charging it. Battery tender jr still blinking green. That charger costs 80 bucks but it has saved more than one 50 battery as well as a lot of space in my luggage and a lot of shoots because it will work off AC ad DC.
From the charger and used if necessary.
¾ GREEN Flashing - When the green light is flashing the battery charger is in the absorption mode of operation. GREEN FLASHING - When the green light is flashing and the red. About 8 to 10 hrs to go to blinking green charging mode 2. It is safe to remove it at this stage.

