svartbjorn
New Member
I completely agree. It doesn't add up. I did the same calculations before I installed my cell phone charge system, and figured out there should be plenty of battery power to be able to use the light port. However, the reality was quite different. I had never had any issues with the battery power and the gauge bars on the display had always been very accurate and reliable. BUT it all changed once I enabled the light port. The only explanation is that I had enabled the light port. All conditions else were the same as on all previous rides. I discussed with Shimano with the same arguments as you are mentioning - that the light power couldn't count for that much power. Shimano explained to me that the calculations the controller does, are complex. And Shimano confirmed they had seen exactly the same issues as I experienced when the light port enabled. I do not take the chance to test it out again. I had no motor for 5 miles, so I do not want to spoil another ride just to test it again. If anybody could do some more tests, that would be very interesting.A good point; a couple of LEDs shouldn't need that much power. Most lights seem to be 6W, too.
Perhaps there is an issue with the Shimano firmware settings.