Having several camera batteries, I was wondering if anyone has any tips and techniques for keeping track of which ones are charged or not? At the moment I put one of my daughters hair bobbles around the flat batteries.
When out I just put the flat batteries in a different part of my camera bag.
When back home I've got into the habit of charging straight away ready for the next trip.
I also recharge my batteries as soon as possible after a shoot.
One other thing I do is I use a permanent marker to put a "dot" on each battery as I get them - so 1 dot on first - 2 dots on next etc. and this allows me to make sure that I cycle the useage across all the batteries with the benefit of keeping them fresh and not risking "wearing out" any one or two which could cause problems later on.
Canon batteries come with yellow covers to protect the contacts so I keep the covers on fully charged batteries and leave them off used ones. As far as possible I try to fully cycle them.