b41ade Posted August 26 Report Share Posted August 26 Hi guys. Ive just been given 2x 18v xr 4ah batteries. 1x works fine and has just over 18v across the terminals. The other has 20.2v but wont work. It only illuminated the led for aprox 1 second then nothing. Any suggestions please Quote Link to comment Share on other sites More sharing options...
b41ade Posted August 26 Author Report Share Posted August 26 Sorry. I forgot to say all my tools are the 18v xr platform Quote Link to comment Share on other sites More sharing options...
Eric - TIA Posted August 27 Report Share Posted August 27 Check to see if your 18V platform is compatible with the 20v battery. I would think it is, but for some reason, I thought the older Dewalt is not backward compatible, but I am probably wrong. Do all LED lights go on the 20v battery or just one of the led lights? What happens when you put it on a charger? Quote Link to comment Share on other sites More sharing options...
b41ade Posted August 31 Author Report Share Posted August 31 All the leds flicker on then off. The battery is showing full charge and charged without issue. The label just says 18v xr not 20v max so im presuming its meant to be an 18v xr setup. My xr kit is aprox 10 years old but the battery is dated 2015 so i thought shouldnt be an issue Quote Link to comment Share on other sites More sharing options...
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