I purchased an Ariel Rider Rideal in November2021. I used iv last season - May thru October. This year I got the bike out , charged the battery and went for my first ride. In less than 15 minutes the bike conked out, even though 95% of the ride I was using minimum to no electric assist. I thought perhaps I hadn't charged the battery enough. Did an overnight charge, plugged in - charge read "full". But again, in 10 minutes it went dead. So what to do now? New battery - at $250 a pop and lasting one season that seems a bit much. Anything I'm missing?