Ex Demo used Magnum UI5 26" only done 530km
The Magnum UI5 (Urban, 5th Generation) is a geared rear hub bike rated at 300W [there is some discussion about what this really means, so ride a bike before you judge performance based on numbers].
Power is by 8Fun (a reputable Chinese motor manufacturer), down-tube integrated battery by Samsung at 468Wh. I can’t tell you exactly what range this amounts to, suffice to say it is ‘good’ (probably 40-60km).
Putting the battery in the downtube gives the bike a natural regular-bike-like balance that you simply don’t get if the battery is mounted on the rear rack.