Originally Posted by
profjmb
Bike's in basement but there are no outlets. They make external smartphone chargers. Will these work with the di2? If not, anything else I can do rather than charging bike upstairs?
The wireless smartphone chargers work on the principle of magnetic induction, much like a transformer. This requires a coil of wire in the receiving device. Your Di2 doesn't have that. It also requires close proximity, which defeats the point of not running a cord.
Why not run an extension cord? Or wire for an outlet?