Battery label

with my cameras I like to know the battery life span left. I could always go into the menu to check, but far quicker is to dymo tape onto the battery itself. as Shown above

Life span is not the same as amount of energy left in a battery which can be be recharged. Eventually a battery will give up at the end of its life, Hence life span left

Shown below 0 being new and 4 end of life