Electric bike or normal bike?

[Prinnie]

I recently returned to cycling after a 30 year break and at the age of 78 with COPD I went for the Carrera Crosscity electric fold-up.
I find that after around 20 miles at power setting Nr2, the battery dies and then because I am also pushing the motor it becomes HARD WORK. I am not looking for speed just an enjoyable ride out.
Would I be better off with a conventional bike rather than electric? Fortunately living in West London there are not many hills. Any advice would be most welcome, thanks.

 

[sleuthey]

If you have time on your hands it might be worth watching a few episodes of this on catch up:

http://www.channel5.com/show/britain-by-bike-with-larry-george-lamb/