USB charger with solar cell

Here is tear-down view of the following USB charger:

SilverCrest SPBS 5000 B2
Battery: 3.7V 5000 mAh 18.5Wh
Input: 5V 2100 mA
Output: 5V 2100 mA
Manufactured 2018-10

It was sold by LIDL. This device has a built-in battery that can be charged with other USB charger or with built-in solar panel.

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Here is a video review of it:
Silvercrest Power Bank Solar Charger SPBS 5000 B2 TESTING

Let’s take a look what is inside because my USB charger does not work anymore and it is no longer under warranty:

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The inside of this device looks in many details quite similar to the older USB charger sold by LIDL I repaired earlier.

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