Anyways, her bike died on a huge hill on Salt Spring Island 10 days ago. 3 bars on the battery, no display, just shut off. Re-started and it had power through the pedals and throttle but as soon as she tried pedaling under load it died again...no display etc. Took the bike in and they tested the battery, charged it, took it out for a quick 2k run and said it seems ok. Yesterday we went on a 40 K ride and the same thing happened. Any thoughts? Wondering if I have a dead cell?