Giving a range-rating to a battery involves a lot of variables, such as terrain, weight, rolling resistance, rider, and even things like weather or bike maintenance. To reduce the influence of these factors, we tested all of our batteries under the most neutral conditions available.
We put our 170lb rider and our 30lb test-bike on flat terrain and held the button down. With a full charge and without any pedaling we measured the distance that the kit could go under its own power. Under these conditions the 12-mile sprinter kit, for example, would take you 12 miles, but assuming that you pedal your bike and use it intermittently, it will likely last you much longer!
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