It has a built-in plug that folds up for easy storage, and colorful lights that clearly indicate when each battery is dead (red), half-full (yellow), or fully charged (green). This is the charger ...
and orange indicators on Ryobi's 80V Zero Turn Mower battery charger. The problem is that unless you're an avid Ryobi user or have studied the manual, you may not always know what some flashing ...