We have 2 rather unique VeloMini electric folding bikes. They have 3 speeds and can be peddled like a normal bike, or you can push a button to turn on the small motor and engage something called peddle assist which adds power to your peddling (especially nice when going up a steep hill), or you can simply then stop peddling and twist the right hand grip to engage the motor and just doodle along. The bikes will go ~12 miles in that manner at a top speed of 12 mph. They are a kick to ride, and we often turn heads because the bikes are somewhat unusual looking. The wheels are a 12" radius so it takes a few moments to get comfortable with your balance and turning, but once you have the feel you are good to go. The bikes weight ~32 pounds and fold downward as opposed to in half. This was hugely important for us when we researched and bought them since they needed to fit into the cockpit of our 23' boat while we were cruising the east coast and Erie Canal. We also bought a "bike trailer" built by Burley and named "Travoy." With this clipped to the seat post of the bike we could bike to the grocery store, to the laundromat, etc. This folding lightweight trailer holds ~60 pounds of goods and looks similar to a hand truck with bags. Very handy when the facilities you want to access are a few miles away and your don't have (or want to use) a vehicle.
Rob