Power bank with solar panel how much more efficient than usual
Hello dear guests and subscribers of my channel! Today I want to talk with you about such an electronic gadget as a power bank with a built-in solar panel and find out how different it is from a regular Power bank. Interesting? Let's start then.
Power bank with solar panel
First, I want to say a few words about where and for what I bought this gadget. So, I bought it in all of you known online store for 599 rubles, of course, with free shipping.
The package arrived within three weeks in a rather shabby form, but everything inside turned out to be whole.
Specifically, in my case, in addition to the power bank itself, the kit also included:
- A short USB charging cord.
- Carbine.
- And the instruction is in two languages: Chinese and English (who needs these instructions at all).
Understanding the efficiency of a built-in solar panel
So, now let's figure out how effective a built-in solar panel is in a powerbank.
To do this, I disassembled the case, and here is what brand of solar panel is installed there:
So, now let's check what voltage the panel gives out under load:
Such panels have an installed power of 1.5 watts. So, knowing the rated power and voltage, we can easily calculate what current a particular panel produces.
I = P / V = (1.5 Watts) / (4.41 Volts) = 0.340 Amperes
As you can see, the output current (under ideal conditions in direct sunlight) is 0.340 Ampere.
And since the capacity (declared) of the specifically considered power bank is equal to 20,000 mA / h, it will be charged for almost eight days (taking into account that the active light phase is at least 8 hours).
Conclusion
From this we can make one single conclusion that the solar panel on the Power bank is just a decorative piece that (undeniably) looks beautiful but has no practical use carries.
Therefore, if you were thinking of buying an ordinary powerbank or overpaying and taking a cool one with a solar panel because of the ability to charge it in the sun, then take the usual.
If you just liked the design and are ready to add a little, then I bought this gadget here in this store.
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