As you could see from my video testing if solar cell phone charger worked, you can see that it charges my cell phone. However, while it charges it, it doesn't charge it even one bar up of the battery. It took me a while to figure out where the problem was.
First, I thought that maybe me being in Ukraine in the middle of December and January with shortest days in the year did not give enough sunshine for my phone to be charged. Then, I came back to Indiana, where I am studying right now, waited till the end of February, and left my phone to get charged for three-four hours in the bright sun shine, and still nothing.
This is when I decided to come back to the video that explains how electricity works. It said that amperage is a speed with which electrons are moving. So I thought maybe a faster current (=larger amperage) could help and started asking people around if that is true (people who know physics and electricity are probably laughing at me right now, and it's okay:) I am happy I figured it out!).
After a little bit of research and asking people who made chargers before, I found out that my solar panel amperage is smaller than it needs to be. My solar panel gives more than 5 volts and about 200 mA. The voltage is perfect, but the amperage is only enough to make it look like it charges, but in fact, it's not strong enough to charge my phone fully. The minimum for phone to look like it's charging is 200 mA, but it should be about 500 mA to actually charge my battery. I didn't have a chance to create a larger amperage yet, so I cannot say if 500 mA is actually enough, but when I do (probably only in summer), I will update this post with the results of my experiment.
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