Chemistry determines the cell voltage (1.2V or 1.5V and there are others like Lithium at 3.0V), whether the battery is rechargeable, and how the voltage changes as the battery discharges i.e. at what voltage is the battery considered to be flat or fully charged. Switched mode power supplies. One more point.
The Average Bike Riding Speed. The average road bike speed is between 11 and 12 mph. Bike riding speeds vary widely depending on your riding conditions. When you are zooming down a paved hill, your speed may increase to over 20 mph, while you may slow to only a few miles per hour when you are climbing a steep or rocky grade.
Riding with a speed with 15 mph is considered vigorous cycling. When you bicycle 14 to 15.9 mph, you burn 44 to 61 calories per mile on average. Longer rides with a lot of climbing burn about the same amount of calories. Calories burned cycling 20 mph. Bicycling with 20 mph is a racing.iding at a moderate speed (12 â 14 mph / 20- 22 km per hour) you will burn approximately 235 calories per half hour (30 minutes).