I understand the cost involved. Hopefully more people can provide you with more cells so you can increase your sample size. Testing with just one cell may lead to erroneous results due to chance alone.
Golstons still seem bottom of the back, but the inconsistency between 0.5 and 1 A is puzzling. Unless there's an electronics explanation (I'm ignorant in that respect)...
In any case, it's awesome that you're doing this for us. It seems like a lot of work and is an important contribution. /ubbthreads/images/graemlins/thumbsup.gif
Ed: Do you need specific brands, or are people just sending you whatever they have? Maybe if we knew how many cells you've tested of each brand people can send you more (or less) of each kind to increase sample size.