I usually start charging my head lamp from the night before at 9am, that takes two hours. Then my bluetooth music thingy, another 1-2 hours. Then in the afternoon top up my phone, 2-3 hours. On my last trip I had 2 phones, not with overly large batteries, but managed to keep them both okay using the dyno hub. That being said, I am a very light phone user. It's more about the ride...