Hi guys. First post, and I registered as Davids videos are great and I hope to learn a little about electronics one day and make one or two things.
So when I saw this post, I though it would help to point out one or two obvious points to help save some time.
Statistical analyses and general variation. What of? Battery charge and manufacturing tolerances or manufacture quality checks.
Long story short, check out Bigclivedotcom (his site, youtube or anyone else doing such tests) on
total battery charge tests. So if you are very selective on your published results, it's easy to pretend even canned hot air would change a batteries performance!
Basically many
brands vary off the charts all over the place. So a 800% difference is not surprising for the batteries, with or without a joule thief!
[Edit]
Ps, oh, that video from TechnologyCatalyst is gold. Seems this is more than just using some noisy data to fake some figures... is it completely false advertising?