There are different driving techniques to getting the best range out the battery.
I have found what works best for me is not trying to go over 52MPH. Another is not to creep or trundle in traffic. ie. don’t crawl along at 5-10 mph accelerate up and free wheel works a lot better.
The low speed torque to keep the car moving at a constant 5mph uses more power than stop start. I have found that the recharge stops below 8MPH so if you can get above this and then release the pedal you will do better than a steady lower speed.
Having said that, the hill back to my house will knock 8 miles off the estimated range in one go and that is without max power all the way up. Shame it doesn’t add 8 miles on the way down.
Oh and one last thing staying below the speed limit, especially when there are camera’s about helps save money!