Thanks for posting that!
That video doesn't really show me what I had hoped to see. However, important to keep in mind is that he's cutting frozen, snowy-wood. It'd also be interesting to know what the ambient temperature was, as that will also make a difference (extreme cold, extreme heat, or inbetween.
His see-saw cutting style also changes how the saw could cut.
Sounds like the battery life is solid, though.
Can't wait to see more!