So today my Varia Light (515) battery was running low so I turned it off while on paths and turned it back on while back on the road (physically, using its power button). One of my data fieldon my Edge is a pictogram of the Varia's battery level. Of course, when I turned it off, it showed a ? across the pictogram but when I turned it back on, it stated at that state, although it was recognized by my Edge (and watch) and showed me incoming cars, like it should. To me this a bug as it should have displayed the battery power level back.