This 6 A 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 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. The 6 A charger also features through-hole mounts, secure latching and double insulation.