What does fuck off with every minute possible option that creates energy mean ?

I'm not an engineer and don't understand how things work. You can create power but it's like Kinect energy. Maybe the flush of a toilet is more energy than you'd get from a turbine. You'd need to make sure nothing solid blocked the device. Would need to get everything tiny to fit and yeah would be miniscule power.

It's definitely doable but I think the output would just be lower than turning off a light or something.

I've no idea but someone will know.

I think something like a wind turbine in a car would be more useful. Just solar panels on a car would be useful. You might get 5/10 miles extra range. I think that's more useful than a fraction of a percentage from toilets.

Now rivers/ canals and waterways. That might give you enough power that it's worth it. Again maintenance would be an issue. Boats fish humans potentially. Maybe the odd shopping trolley and escooters