But several other possibilities are being explored, including contamination or defect during manufacturing, flaws in the design or construction of the battery, and problems with battery charging.
Yes, of course, technology changes but the problems that businesses face in charging for the products of such new technologies change a lot less than most seem to think.
But while Leinster were error-prone in defence, their attack had no such problems and another Costello break was finished off by Aidan McCullen charging over for a try.
Given all the problems that there are in the world, I have not been very concerned about private schools not charging enough, but it is good to know there is somebody paying attention.