Hello, on my bike I’ve got an excellent SON dynamo which allows me to charge usb devices, not directly as the dynamo produces AC, but via a device called AppCon (which is an AC/DC converter & power bank in one device, produced by the company NC17 in Germany). It works fine with my former smartphones (other brand but also FP3), Garmin, Shimano Di2 battery, etc.).
What a surprise when I notice the nightmare with my FP4! It drained very quickly almost the whole capacity of the power bank while loading the FP4 with 3-4% only, both getting hot before stopping loading. Tried different cables and also at home in a quiet environment (not the same while riding on the bike).
Are there people here with similar experiences? I’d like to read your feedback and most of all the solution(s) you found.
Charging on a usual plug from the net is fine, and also from a « normal » power bank it works fine.
The solution envisaged for me will be to carry another « normal » power bank which can be charged without problem from the AppCon and which can charge my FP4. The main drawback being to use an additional device and its weight (I mainly ride long distances 600km+ in autonomy), as well as the efficiency reduction (two power banks in series, I was told).
Many thanks in advance for your support in the matter,