For me, there's a huge difference between going from 0-50% in 30 minutes vs. 0-100% in zero minutes. Especially when traveling or working in remote field sites.

For me, there's a huge difference between going from 0-50% in 30 minutes vs. 0-100% in zero minutes. Especially when traveling or working in remote field sites. In the past I've often not been near an outlet, or my home, or my car, for multiple days straight. I do carry charger packs but it's a lot nicer to just instantly have a 100% battery than have an extended period of time when your phone is tethered to another bulky block. Also, for ADHD people, sometimes they fail at "remembering to connect to a charger" when its available, and find themselves in situations where they need their phone but the phone is dead -- swapping a battery in would be a quick save.