How much energy you need from a solar panel to charge a battery that has 3.75 volts?
Question:
What do you call the power from the charger that goes to the cellphone? output maybe? or input?
How much power the charger produces to charge a cellphone?
Please answer my questions...
Thank You!
There is no answer for the energy from a solar panel to charge a battery at 3.75 volts because you need to know the amperage or wattage of the solar panel. A 3.75 volts panel with low amperage will charge a battery but take longer than a high amperage panel.
There are also panels that have flat amperage outputs with varying voltages. It might damage your cellphone to use a panel with too high voltage or amperage.
Output is what you can use, input is what it takes to run, in otherwords, the efficiency.
If the input is 5000 btuh and the output is 3750 btuh, the efficiency is 3750/5000 = 75%
To the cellphone is the output of the charger.
The amount of power varies by manufacturer. There are chargers with varying voltages, varying amperages, or a combination of both.
To make things simple..
I would look at the regular cell phone charger (wall plug type), and it says on it, for example, Output 5V DC 0.7 A
This is what your solar cell should deliver at full sun blast.
The regulating circuit for charging your cell phone battery is inside the phone, so even if your battery is 3.7Volt, the charger delivers 5 Volt.
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