They have a little bit more detail than just great battery life, although I’m not sure how accurate they can ever be since variance in people’s weight and the slope of uphill/downhill is vague. There will of course be far less energy regained on the downhill slopes.

Are you worried about running out of juice mid-hike? Fear not. The MO/GO’s battery lasts for over three hours of continuous uphill walking at maximum assistance. Plus, it recharges automatically during downhill walking—talk about efficiency. For those extra-long adventures, you can quickly swap out the battery on the go for extended range.

I’m guessing that means single digit km on a steep slope and who knows what past that. Certainly not multiple days, which should be obvious for any kind of battery powered device.