Primarily used in consumer grade batteries, Sanyo’s Enloop battery technology has been applied to a bicycle.  The Enloop bike can assist the rider for up to 100km by providing 70% of the power and tops out at 15km/h.  3 speeds are available as well as 3 assist modes.  I’d assume there’s a power up mode but the linked article is pretty vague.

The Enloop bike will hit the Japanese market for about $1,450 US.

[Akihabranews]