I suggest you rather read this:
http://www.icnirp.org/cms/upload/publications/ICNIRPmvtgdl_2014.pdf
And don't worry: the way electromagnetic (nonionizing) radiation can damage reproductive organs is by vibrating water molecules and “heating” them, that is not good...
This is exactly as a microwave oven works, as it is designed to make them resonate (the water molecules, not the...balls

) using EM radiation that oscillates at 2.45 GHz, or 2.45 billion times per second.
The reason I know this is because I'm a physicist, I've been working with microwave detectors for astronomy for decades, and to calibrate them I used a microwave generator called a Klystron, which is the same one that was used for early radar during WWII (Battle of Britain). When you work with that stuff you have to be careful, because they can actually induce damage to soft biological tissues and in particular to the reproductive one and the brain.
But when you have a stationary or nearly stationary electric field, such as that emitted by a running battery, you can't produce any electromagnetic radiation that can heat up your balls.
Just to say: the risk associated with using your computer or phone to write those messages is marginal but still orders of magnitude larger than the one by pedaling several hours a day, despite the distance from your balls.