I tend to be skeptical of new tech, but I started grinning watching the video. I am far more entertained by and interested in these than I expected to be. Mayb

I tend to be skeptical of new tech, but I started grinning watching the video. I am far more entertained by and interested in these than I expected to be. Maybe that's because I used to commute by train, and these seem perfect for shortening the walk on either end / helping you avoid becoming a sweat-mess during the walk. I'm really curious how hard it is to replace or swap the batteries. The website says they use 18650 cells, so if you can access the batteries with a screwdriver, I could easily imagine doubling or tripling your range with a backpack and some spares charged overnight.