The Luna Cycle Eclipse is a folder with full suspension, a Gates belt drive, does about 25 mph and has a 20-ish mile range depending on the usual factors. I had one for a while and it was a decent bike. The suspension was very entry level but it worked ok. It is a folder but it isn't super compact. At $1500.00 though, It's pretty tough to find a new bike with those features for cheaper. I put several hundred miles on mine and then upgraded to something faster (and much heavier).
Luna offers its first hub motor powered bike and its most affordable ebike for fun cruising !
lunacycle.com
Then, there is this thing:
The Jack Rabbit is super light at 24 lbs. and more compact than most folding bikes. It will do around 20 mph and has a range of 10-12 miles. (you could opt for an extra battery carry that with and still be under 30 lbs.) I rode one recently and it was pretty fun. It felt sturdy and well made for what it is. Definitely not a performance oriented bike though. More something to keep on a boat or RV etc. $1000.00
The JackRabbit eBike: 20mph of pure electric power, yet light enough to carry up stairs and small enough to pop in the trunk or tuck away in a closet. With extra sturdy tires, the JackRabbit can take on any bump in the road for a super smooth ride.
jackrabbit.bike
Keep in mind that just a battery and motor combo can easily weigh 20 lbs. or more if they have a decent amount of power/range.
Typically, Light+Fast+Durable=$$$ if not, It's probably not going to last very long.