Here's my trusty steed, Walter, leaning against the Battle of Naseby monument.
On the rack bag can be seen my dynamo and solar power battery charger.
With it I can charge my NiMH batteries and my phone camera (with which these pictures were taken)
from the dynamo and solar panel and be completely self sufficient for power during my cycle tours.
The first of these two photos shows the solar panel on one side of the charger unit
and the other shows the batteries and electronics inside it.