This 12 A fast charger has the highest charge rate in our 20 V MAX and DeWALT® FLEXVOLT® lithium-ion battery range, minimizing downtime on the site. The new Stage 1 and Stage 2 LED indicators communicate more about the battery's state of charge than those without. The stage 1 LED blinks until the battery is approximately 80% charged. It then stays solid and the stage 2 LED blinks until the battery is fully charged. DeWALT® Fast Charger, Cordless Tool, For Use With: 20 V MAX and FLEXVOLT® Batteries, 20 V Output, 12 A