Famous Black And Decker 20 V Lithium Blinking Red Light References. A red flashing light indicates that the battery is not charging due to the charger. During another household project, i used the battery as a power supply for something else.

Web red is the black and decker battery charger’s fault indicator light. This is a great tool and i hope my answer helps. Other possibilities include inadequate power, a damaged battery, malfunctioning charger, or glitch in the system.
