[jackvalentine]

Okay I have 10% extra battery life - what can I do with that I’m not already doing?

Extra battery life is a feature, not an outcome.

[arcticbull]

The outcome is your phone lasts longer. And your experience with it improves as the network is more available when you need it.

[jackvalentine]

My phone lasts longer and that lets me _____

Nobody is wandering around wanting their phone to last longer purely for that sake.

[AaronFriel]

Lets you use your phone for longer between charges. You're acting like battery life isn't a user feature, but it is: companies advertise heavily on it, and it can often be a differentiator between midrange and premium phones.

You're looking for a user story where only looking at the corollary makes it obvious that battery life enables everything else.

Suppose you shipped a phone with 99% less battery life than its competitors. You could, at trivial expense, increase your 1% to 10%, your engineers propose how to do so.

You reply, "My phone lasts longer and that lets me _____".

To which your engineers reply, "Use your phone?"