I know that someone is looking at the tail end of the graph and thinking that the battery is not fully depleted. You're correct. There's a *tiny* amount of energy left and the battery voltage will recover to the point that the device will power back on. So, I ran a subsequent test. It ran for 10 minutes. That's about 1.5% longer. Not 800%.
This would be even worse with an external boost converter since one is giving up about 10% of the efficiency.
To conclude, this class of devices already have excellent battery management technology. The Garmin GPS series that use two AA batteries clearly already have a boost converter built in. Adding an external boost converter is not a plausible method to increase run time.
These devices do NOT leave 80% of the energy remaining in an alkaline battery after they reach cutout voltage of 1.05 to 1.10 V.
Attempting to use the battery beyond the initial cutoff voltage can only be expected to increase operation time by a few minutes, NOT hours.
I have now tested Batteroo's premise on the three major classes of specific devices they claim will benefit from their technology. Batteroo has already admitted publicly that low-drain devices such as remote controls will not benefit. My testing of these devices shows that none of them comes remotely close to reporting dead batteries while leaving 80% of the energy remaining in the battery.
Since the premises are flawed, so must be the conclusion.
As I have already offered, I will reproduce these tests in person, if I am given reasonable time accommodations. You come to me. If there is a question, PM me. I will respond.