Cool Black And Decker Battery Charger 18V Red Light Ideas. Web if your black and decker charger has a blinking red light, it’s probably due to an overheating battery. If the charger’s light is out, try connecting it to a different outlet.

Web battery won’t charge with blinking red light on the charger. If so, please allow the battery to cool, then reinsert the battery on charger to try charging again. Unplug the battery for around 15 minutes if it is too hot, then try charging the battery again.

