Great tester, great test, great web presentation! I've done something similar manually on a very small number of batteries and reached a similar conclusion that the bargain store batteries perform very well. The previous comment about leakage is extremely important. Though the performance of zinc is dismal, they don't destroy the device you use them in if left discharged for a brief time. Akalines are a disaster in that regard and I try not to use them unless required. The physical construction, I think, makes them inherently more apt to leak. All my AA wall clocks and similar get zinc batteries from the discount store. The temperature performance of zinc is bad, so my outdoor weather station modules get akalines. Again, great job!