I think originally POET would always use the statement "charge your phone once per week", but like many other performance metrics, they have backed off a bit. I recall in recent history hearing 1 - 2 times for charging your cell phone.

For example, in the CIC video (and can look at the transcript) at 05:45 there is this statement "With the power savings they could either shrink the battery and make the phone thinner, or keep the battery the same size and you will only have to charge it maybe once or twice a week instead of every day".

I would think that "official" performance metrics is what will matter (among other things).

Good luck!!