Because
solar battery chargers are still rather uncommon and not often used,
people who consider using them are a little worried about doing so
because they do not understand exactly what to expect.
One of the main questions they have about solar battery chargers is
if they will actually drain the batteries at night.
Many of the more-sophisticated chargers have a built-in diode that ensures
that there will be no reverse current problems when the battery is on
the charger. What this does is prevent any kind of an electrical charge
from turning around and coming back from your device’s battery
and into the batteries that are in the device.
Because people who camp are the ones who tend to often use solar battery
chargers, they are often interested to know if the chargers are waterproof.
There are some waterproof chargers, but water resistant might be a
better word to use than waterproof. It is best to simply assume that
the solar battery charger is not waterproof. Working under this assumption
will help keep the charger in workable shape, even if it has some water
resistant qualities.
Having a better basic understanding of how these solar chargers work
can be beneficial when deciding whether or not to buy them.