This timeless expression applies to so many situations, situations — ever rushed. Ever rushed to the doctor’s office just to wait forever before they call you back? Most batteries live their entire life in this perpetual purgatory just waiting for their moment to shine. Usually they are in a flashlight, remote control, or garage door opener, but batteries also backup mission critical systems, telecom equipment, and other critical appliances we need when the grid goes down. Too often, though, many of these batteries don’t work when they are needed the most. These batteries fail, and there are many reasons why. Most importantly, there are a few things we can do to prevent these failures and make sure the lights stay on.