Input voltage to sim800L

Projects General Guidance
1

Hello Community;
I'm currently working on a project that involves the esp32 and the Sim800L. According to the datasheet, the supply voltage for the SIM800L is between 3.4V and 4.4V, but 4.0V is recommended. Should I power the Sim800l with two Li-ion batteries in series and use a buck converter to regulate the voltage to 4.0V, or should I power it with two Li-ion batteries in parallel?

2

Please provide a link to YOUR modem module datasheet.
The chipset probably has different voltages than the ‘shield’.

And keep in mind - the 800 is a 2G modem, cheap, but with a VERY limited life expectancy !

3

Thank you for the quick response. (https://datasheetspdf.com/pdf/989664/SIMCom/SIM800L/1)

4

Or just one. Those modules are designed to be run directly from Li-based batteries.

5

I think one 3.7V lipo battery will be good. You can see this too.

6

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