The index is a ludicrous product. The battery life, they claim, is 2 years. This is one heck of a misrepresentation. It is actually 12-15 hours. They get the 2 years because its meant to be used around 10-20 times a day, in *3-6 second* recordings.
The device is being marketed as external memory for your brain. I'm hardly a philosopher, but I don't have many useful thoughts that are 3-6 seconds in length. heck, when i try to voice record a thought, i'm uhming and erring for the at least 3 seconds.
That discrepancy isn't explainable given a change in daily use. 12hrs vs 2 years is a 1000x difference. You're saying they expected people to use it 1000x less than they actually are? That's them expecting people to use it for 1 min per day, and people actually are using it for 16 hours per day
Given their track record hitting the battery life projections for the P2D and PT2 (almost), I would give them the benefit of the doubt on the Index01.