Hi. Had a powerbyke years ago and it was fine except something went wrong and could not get it repaired. Now bought IZIP secondhand (two drycell 12v12A) but have problem with that. would welcome advice. Battery indicator shows only one LED. Replaced batteries but same problem. Any help or advice for parts would be greatly appreciated. Was buying new but wife needed two hips and list was about 9 months so that came first. would like to get this bike working due to my bad chest.