Double sided battery indicator caps are designed firstly to keep you packs safe during travel or storage. The odds of something actually shorting the connector in a bag with other items in it is very small but you know how it goes, Murphy's law and all...
Printed in multi-color to indicate battery charge for reference. I use these every day just for the peace of mind that I am not going to grab a empty pack when time is tight to change batteries, it's happened to me before...
