hello friends do you know if, can this shield (SIM808 EVB V3.2) charge a lithium battery directly or i need additional hardware?, I know that module has conection for battery but it can charge it?
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The module does not include a charging circuit for Lithium-ion cells.
According to the SIM808 Hardware Design document, Page 28, the SIM808 module does integrate Lithium-ion cell charging.
It states that the battery should have it's own overcharge, over discharge, over current protection, and reverse-polarity protection.