Trollied!

I managed to test the new battery on the trolley. It worked but not without concern. The LCD screen showed just one bar and then no bars after 10 minutes. This usually indicated the battery strength. However, despite the indicator, the trolley kept running non-stop for over 30 mins. 

When I put the old battery on again, it failed immediately so I am encouraged that it is just a new battery is the solution and not a new trolley and bag which would be super expensive!