There’s nothing worse that gearing up for a ride, heading out to your garage, hoping on your bike, and hearing that “click, click, click” of a dead battery. We’ve all left something on, forget to turn a switch off, or just waited too long to replace an aging battery. Trickle chargers will greatly extend the life of a battery, but sometimes, if a battery is too far gone, even they can’t bring one back from the dead. The Optima Digital 400 may just be a knight in shining armor to save those batteries from the recycle pile. For starters, the Digital 400 is easy to read and extremely compact. It has three different ways to mount it, including a Velcro hook, a stand, or an included wall mount. A built-in microprocessor determines the state of the battery and adjusts to either charge or maintain the battery. It’s also specifically designed to be used on Optima and other AGM batteries. You can also run a quick test to see if the battery is still good or not. The easy-to-read lighted LCD screen takes the guesswork out of what’s going on and the buttons are raised and big for easy access even with greasy hands. To charge or maintain a healthy battery, just connect the leads, selected the type of battery, and go. The Digital 400 does the rest. At just less than $110, the Digital 400 will pay for itself with one saved battery. Leave it connected to make sure you never have to hear the click of death again.