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  1. M

    Wisper 905e cuts out for a few seconds when going up steep hills

    I hope someone can give me some advice, or a solution to my problem, when cycling up a steep hill, of which there are many in Sheffield ! if my speed drops below 9 mph, the power can often cut out for about 4 to five revolutions of the pedals. The battery is getting on a bit (4 - 5 years old...