The larger left-hand section of the light bar will be flashing red. If the right-hand section is also lit up then this means there is a problem with the battery and/or charger. Solid Single Red Light Diagnostics with bright LED indicator communicates battery charge status: charged, charging, power problem, and battery too hot or too cold I love this, and it is not something I have seen with other power tools brands so far, although I haven’t used every single brand out there so maybe others do this too. What this means for you is that you don’t need a separate charger for your 18V batteries and 12V batteries if you get tools on both platforms. The Lights This means that the battery is charging correctly and is not yet fully charged. This is essentially the default “working” light. The charger is busy charging your tool battery and it has not yet been fully charged. One Flashing Light If you keep getting an error like this then the battery may well be damaged. You do not want to keep overheating the battery like this time and time again as lithium-ion battery fires can be very dangerous. If these battery set on fire they can explode and cause huge damage. Related Posts

DEWALT DCB115 DEWDCB115 DCB115-GB XR Multi Voltage Li-Ion

Let’s start by having a good look at the charger. The one I am using for this example is a DCB115 XR Li-Ion charger. This charger works with multiple different batteries including 10.8V, 12V, 14.4V and 18V. When the flashing red light turns solid your battery has been fully charged. At this point, you can remove the battery from the charger and use it in your power tool. One Solid Light Left Hand Flashing Right Solid If both sections of the LED bar are lit up then you have a problem with your battery or charger. It is most likely overheating so simply remove it from the charger and let it cool before attempting to charge it again. This is where the actual information on the charger is displayed. This DeWALT battery charger is actually quite simple and only has two different lights. These two lights are used to display the charge status and also give an error if there is a problem. Single Flashing Light