Cliff Notes version: The F5x according to the battery indicator during charging, appears to care 12% each 15 minutes, or 48% per hour.
Longer Version:
I was curious, so in an unscientific way, I wanted to see how quickly the F5x charges. Before starting my watch was at 24% charge.
At 15min intervals, this was the progression, when F5x was connected directly to the wall AC.
Time 0: 24%
T0 + 15min: 36%
T0 + 30min: 48%
T0 + 45min: 60%
T0 + 60min: 72%
T0 + 75min: 84%
T0 + 90min: 96%
~T0 +98min: 100%
next time I will do the same test, but with my USB battery, since that is the more critical time for us ultra runners, on how long we need to carry the battery to get the charge level we need.
