That's 1% extra battery life with the Batteriser on the dead Alkaline! LMAO!

Can your meter do energy measurement? It would be interesting to see how many Wh you can get out of a battery with and without the batteriser. Buy a 10-pack of cheap alkalines (and make the assumption that all batteries in the pack have approximately the same energy in them), then run some flat without a batterizer on and some with it. Maybe do it for a constant power load (simulating devices that have their own boost converter in them, which is most electronics nowadays) and for a purely resistive load (simulating a "simple" device like torches and toys).

Thank you for your time at evaluating this product with 4 videos. I'm almost sure you did more than the manufacturer did himself ! Anyhow, for what it's worth, opinion wise, I would personally stay away from that product. The physical aspect doesn't inspire me in the sense that since it doesn't seem to have any electronics involved, I'm rather suspicious. If you had so much difficulty to put the batteries (with the batterizer thingie) in devices and then had to use a screwdriver to pull them out, most people will end end either breaking the device or the batterizer, so to my eyes this isn't worth the trouble. This is similar to some 18650 batteries manufacturer which are including some protective gear inside the battery but the overall size ends up to be slightly longer which prevents the buyers to use regular 18650 battery holders or chargers. Globally if the odds are that I might break something trying to make it fit, I'll simply pass my turn. I respect your ideas and appreciate the time you invested to prepare and share your tests but I have to admit, at this moment, I don't quite believe in this product. I don't know if this is a myth but I heard that if we "squeeze" a battery, as evenly as possible and without getting too excited about it, this would induce a voltage variation. Just for my own pleasure I think I'll check if that stuff is available and if the price is decent, I might get some for testing purposes and "see" by myself.

You cannot get more out of the NIMH battery. When its voltage start dropping, it needs to be recharged. But, using it with rechargeable batteries seems like a good use for it in certain, admittedly very rare, things that don't like the lower 1.2v of rechargeable chemistry. The battery won't last as long between charges, but it will have the higher voltage. However, NIMH batteries don't follow the size standard as well as disposables, which will make the battery not fit when it is made even larger by the batteriser being on it.

Interesting serious of videos, thanks. You mouse eats batteries though, my Logitech lasts so long on a pair of AAA batteries I virtually can't remember how to replace them. I'd guess it probably lasts a year or more with daily use.

These are dangerous, then. If someone is silly enough to use this sort of thing in a critical device, such as a smoke detector, all it does is disable the low battery warning.

are you adding these 2 video's to EEVBlog forum?

Some interesting info about the Batterizer can be found at the following link : www.candlepowerforums.com/vb/showthread.php?428675-Test-review-of-Batteroo-AA-with-a-Duracell-battery. Keep in mind that I'm not affiliated to that site in any way shape or form.

The battery technology problem revealed by this video is not the trivial problem of the Batteriser being poor value, it's a mouse that will only work for 26 days on one set of batteries. But nobody seems to want to take on Logitech (or Apple). I guess Batteriser are the currently fashionable target for electronics geeks - maybe fashion will move on and settle on some more extreme rip-offs.