Originally Posted by
pdlamb
If you're riding where there are tunnels, having the dyno tail light (and headlight, for that matter) makes it easier. No need to pfaff about getting a rack-mounted tail light (which seem to be getting a lot scarcer in the last few years). No need to stop and turn them on and off, Flip up the shades and ride right on through.
Yep, this, Japan where we go a fair bit is full of tunnels. Longest one so far was 3.5km long (about 2 miles) one day we spent 20% of 85km underground.... Plus even Japan has big rural areas where power points are scarce, especially when some convenience stores will call the police on you for stealing power. The Japanese have a bee in their bonnet about power theft. I've seen lockable power points that must have costs 100s more to protect than the cost of power used by a mobile phone charger.
When we are touring in non english speaking countries power consumption can be pretty high, phone stays on for google translate and maps. Tourist areas have english signs but the rural areas often don't. Plus the limited network frequencies mean that the phone sometimes has to work much harder to receive and transmit to distant cell towers that have the right frequencies. (next phone will be a world model for me, with as many LTE frequencies as it can).