This 6 Amp charger offers the most versatility for all of your charging needs. All Lithium Ion batteries within our Compact 12V, 20V MAX, and heavy-duty DEWALT FLEXVOLT battery range are compatible with this charger. The new Stage 1 and Stage 2 LED indicators communicate more about the batteryins state of charge than those without. The Stage 1 LED blinks until the battery is approximately 80 percent charged. It then stays solid and the Stage 2 LED blinks until the battery is fully charged. The 6 Amp charger also features through-hole mounts, secure latching, and double insulation.