Cordless batteries reach full charge in approximately 61 to 101 minutes depending on the size of your battery, so you can swiftly return to your cleaning tasks. Monitor your battery's charge level using the charge status indicator with intuitive lights. The charger indicator light will turn on solid red (standby) after inserting the battery. When a charge cycle begins, the indicator will change from solid red to flashing green. When the charger indicator light changes from flashing green to solid green, the battery is 100% charged.