B70 is a bottle battery designed by Qiroll for bicycle conversion kits, with a voltage of 25V, a capacity of 200WH, a diameter of 70mm, and a weight of 1kg. It can be installed in any water bottle holder and water bottle sleeve, a single set of B70 battery has a range of 46km, and the fastest charging time is 2 hours. You can carry 2 sets of batteries for a 100km cycling challenge.