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Old September 17th, 2012, 02:26 PM   #9 (permalink)
Harry2
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Quote:
Originally Posted by 787323 View Post
anyone every try or hear anything about those solar battery chargers? I have seen commercials about them and am kinda interested........
I assume you mean this solar panels with a build-in battery.

I've such a solar charger with a 3300mAh battery.
Charging the phone isn't a problem

But charging the the build-in battery of the solar charger by using the sunshine, that is a problem
It works, but it needs about three sunny days to charge its build-in battery.

The reason for this delay is a general design error of this kind of solar chargers with build-in batteries.
The panel needs the sun, but the in-build Li-Ion battery hates the heat of the sun.

A Li-Ion battery to charge above temperatures of +45C (+113F) will be dangerous, so the charging circuit will shut off the charging when the battery reaches this temperature.
So there will be delays, because when the sun is the brightest the charging of the solar charger will be shut off

Far better are solar panels without a build-in battery. They can charge the phone directly or can charge a separate mobile charger's build-in battery for later use.

For such a "stand-alone" solar panel one should choose high quality.
Cheap panels won't become a joyfully toy

Harry
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