Cycling

DYNABANK is ideal for providing energy during bikepacking. It is a power bank that is optimized for charging from an alternator in a hub. Like DYNAUSB, it uses a high-efficiency rectifier with MOSFET transistors for maximum efficiency, but everything else is different. The integrated Li-Ion battery with a capacity of 10,000 mAh is charged during the ride. The advantage over direct charging of a mobile phone is the use of the maximum available power for charging at any speed. Charging starts at about 8 kph and increases with higher speed. Charging is controlled by an dc/dc controller to obtain maximum efficiency. The charging is optimized for available power from alternator and it increases with higher speed in linear manner up to about 40 km/h. Due to this linearity you get constant capacity per km, typically it is 3 Ah/100km. When riding with speed 20 kph it is 5 hours. You get typically more energy than is using mobile phone for navigation (tested with OsmAnd and screen saver).