I have a little fan that uses two AAA cells. It draws nearly 1A!
Ni-MH rechargable cells have a capacity of 750ma/hrs and power it at full speed for about half an hour then slower and slower for the next half an hour.
I have a real plug-in charger for them.

I bought a 12V/150mA solar panel on sale. Through a window at noon I got 6V at 50mA. With the window open I got 13V but it dropped when it was loaded, 9V at 80mA max. I am in Canada, not on the equator, the sun was about 20 degrees from vertical. It is very critical to the aim at the sun.

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Uncle $crooge

 

Is the 12V/150mA expensive? Is it rated maximum voltage and current that afford to supply?

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Superman returns..

 

Pretty cheap. I paid $10.00 Canadian. The sun is too far away and keeps moving.

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Uncle $crooge

 

I've found one, 4.5V/80mA, if i charge 4 AA Ni-MH, they won't be full right?
If the solar panel is used indoor, energy source from the light. How low is the current & voltage be?

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Superman returns..

 

No. Ni-MH cells need 1.4V each to be fully charged. Four of them plus a series diode to block discharge at night equals a charging voltage of 6.3V. Your solar panel is only 4.5V.

I don't know your light. Candles?
If it is outside then it will supply 80mA for 1 hour per day at noon when the weather is sunny. The AA Ni-MH cells are rated at 2500mA/hrs and need 3500mA/hrs to fully charge, so it will take about 3500/80= 44 days to fully charge 2 cells in series.

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Uncle $crooge

 

Haha.. 44 days.. 15 Hours can do this with its own charger.. LOL..

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Superman returns..

 

That is 44 days to charge only 2 cells. The other 2 cells need another 44 days to charge. That is nearly 3 months! If it isn't cloudy!

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Uncle $crooge