user55846: 
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? 

user27653: The module does not include a charging circuit for Lithium-ion cells.

EDIT
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.

55846: <p><img src="https://i.stack.imgur.com/0hOAj.jpg" alt="enter image description here"></p>

<p>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? </p>
 27653: <p>The module does not include a charging circuit for Lithium-ion cells.</p>

<hr>

<p><strong>EDIT</strong></p>

<p>According to the <a href="https://seeeddoc.github.io/Mini_GSM-GPRS_Plus_GPS_Breakout-SIM808/res/SIM808_Hardware_Design_V1.00.pdf#page=28" rel="nofollow noreferrer">SIM808 Hardware Design document, Page 28</a>, the SIM808 module <strong>does</strong> integrate Lithium-ion cell charging.</p>

<p>It states that the battery should have it's own overcharge, over discharge, over current protection, and reverse-polarity protection.</p>
