wemos d1 mini 3.3 V supply

Development Tools IDE 1.x
1

Hi all, for a specific projetc i need to supply the wemos d1 mini with a 3.7 V lipo battery.
When this battery is full tension can rise to 3.9 V. Do you think it could damage the Wemos if i supply it through the 3.3 V pin ?
Thank you
Koal01

2

I suspect the datasheet for the ESP8266 would have that information in Absolute Maximum ratings. But I think lithium ion batteries charge to 4.2V, not 3.9V.

In any case, the D1 Mini has a 3.3V regulator on the board. Why can't you just use the 5V input and eliminate any potential problem?

3

Thanks for your answer. Do you mean supplying the 3.9 battery on the 5v pin on the ESP ?
It won’t be enough to get the wemos stable ? No ?

4

koal01:
Thanks for your answer. Do you mean supplying the 3.9 battery on the 5v pin on the ESP ?
It won’t be enough to get the wemos stable ? No ?

The 5V pin has a regulator of 3.3V. It in to meant compulsory 5V, It is written 5V because it uses the USB 5V power. Connecting the LiPo battery to the 5V pin will work fine, no voltage problems would happen and it can't damage any of your components, just make sure that you are not using any other sensor, or any other components which use 5V as the power supply. These components would have insufficient power supply, but your ESP8266 will work fine.

..Arnav