We know how important it is to keep spare batteries for our cameras and other equipment. The problem is if you’ve got dozens of batteries, you’re never quite sure which ones are fresh. Unless you’ve got separate pockets for freshly-charged and for depleted cells, there’s no real way to check your batteries except by using them.
One way to get around this is by wrapping rubber bands around your fresh cells – just make sure they’re wrapped tight enough so the bands won’t come off while inside your bag. When they’re all used up, toss them back into your bag – sans rubber bands. If your run out our rubber-wrapped-cells, you’ll know it’s time to find a wall socket.