So in the graph above, I see the regulated voltage at 1.80 V.... last for about 30 hours on average for all 3 batteries, then cut off to 0V? And that's testing the batteries under a load that drew 50mA? Meanwhile, the other curves show voltage for the "unregulated" batteries gradually declining until about 50-60 hours? Also under the same current draw of 50mA.
According to the curves, it looks like the "Regulated" circuits only last half as long. Sure they provide a stable 1.8 V for the entire duration, at 50mA (which is not much of a current draw either) and then die abruptly. The other curves drop down to about 1.0V at about 50 hours and then start to die abruptly.
I really don't understand the "table" under the graph showing 1.39V, 1.35V, Regulated, Multiple/1.4 and Multiple/1.35 for the 3 batteries. Can anyone explain what those numbers mean? It would have been nice if they used units somewhere in the table. Are they looking at time? Is that in hours? And what does "3 times" mean, an average? And what is "multiple" and 1.4 and 1.35?
If I were to guess.... The key "trick" to their argument lies in that the "CUTOFF" voltage used for 1.35V let's say, you can see the unregulated curves for the normal batteries at 50mA current draw cross below the 1.35v threshold at about 15 hours. Meanwhile, the "regulated" lines continue until about 30 hours. So you can argue that the regulated batteries last 2x longer if your device cutoff was 1.35v. But if you made your threshold by drawing a horizontal line across the graph at 1.1V, you would have closer to 50 hours out of each battery at 50mA.
I think all the Batteriser does is just make your device run like it has brand new batteries, but for a shorter time. Great if you want nice bright flashlights for half the time. Yes, a bright flashlight when you need it, is better than a dim flashlight. An electric battery-powered toothbrush running at 100% is much better than one that is slowly dying and barely moving. In these situations, you want OPTIMAL VOLTAGE because the product you are using works much better for your needs at that moment.
You usually don't use a flashlight all the time. It sits in the closet and toothbrush sits in the bathroom most of the day. You just want it to turn on, work like it's got BRAND NEW batteries for those 2-3 minutes that you need it, and then turn it off. So even though the batteries may actually work for FEWER hours in those devices, it has more utility for you to be able to have optimal performance for those fewer hours than have crappy performance for many more hours.
Imagine a battery-operated electric shaver. I'd rather have one that runs fast and cuts efficiently and does the job quickly, then string it along (even though the motor will still run) and have it rip out my hairs slowly and painfully and make the experience longer. I think that is what the Batteriser may be going for, and only in a very specific set of devices that have this type of usage behaviour where optimal voltage is required for optimal utility, and where lower voltages will still allow the device to run but the usefulness quickly diminishes. However, the Batteriser marketing goes completely against this notion, but if they market it properly that is the only real benefit I can see.