Hi Alan , Rodger
The MRx has a battery calibration option which allows you to confirm the batteries capacity ie at the end of this test it tells you 96% capacity
The XL also has a battery capacity test - it checks elapsed time and low battery time - and hence the confusion ( in my mind ) why you throw out a battery if it does not charge up to 200J in 3 secs , it seems a bit over the board .
I am still not convienced , however I have ordered new batteries
Cheers George
