Do not buy from Evans! What an utterly useless shop they are. I returned two Mercury 1 bikes that had been faulty from the outset. Both bikes did not hold a charge which was discovered after fully charging them, leaving them for a couple of weeks and finding the flat when we wanted to go out on them. The next time I left them on charge for a period of time which was enough for them to charge and discharge all in their own without being touched. Many owners like me will just leave them on charge until needed, well, you can’t do that with mine. You have a choice, buy from another supplier.