One thing to keep in mind with range is that it can vary a lot. Sometimes my trip home uses like 10-20% of the batter, other times it uses 50-60%. Some of that is an issue of how much I'm pedaling vs how much assistance, but I've gotten only 20% used on a trip home I made standing up and not pedalling at all because my back had gotten hurt (granted, I rolled through all the stop signs I could due to said back pain; how much you slow down and accelerate makes a big difference).
If throttles are allowed, they're nice for when you have an injury or solid fever and still need to get home. In the US, I think class 3 (28mph/45kph cap on assistance) aren't allowed throttles but class 2 (20mph/32kph cap on assistance) are allowed them.