What is the Bosch DualBattery technology?

DualBattery is a system by Bosch for E-Bikes where two batteries are used simultaneously. Riese & Müller uses 500 Wh, 625 Wh and 725 Wh batteries, resulting in a total capacity of up to 1450 Wh. The main advantage is not only the twofold range for single journeys, but also less frequent charging.