I realised that I had forgotten to mention that bit so I edited the post after your first reply!
I watched that. What a fantastic climb! Shame about the traffic though...
The Pinarello he was riding was great but he did use up most of the energy in the battery on that one climb. That would be approximately equivalent to 2-3 of the longer, tougher climbs round here. A very expensive bike too!
A non-cyclist friend was watching with me and she told me that she fancies getting an ebike conversion kit for her bike***. She likes the look of the Swytch kit but that only has a 180 Wh battery, which I think would be pitifully inadequate for the hills we would be tackling. (I also have my doubts that the motor would have enough torque for the steeper stuff.)
@jowwy's 500 Wh battery sounds
a lot more useful.
*** Yes, she does own a bike, but she doesn't ride it because our hills put her off, and the valley roads are too busy for her.