nRF52840 4V use

[hongpal]

Hi nordic

I bought the nrf52840 board so I'm developing.

I want to use the this kind of LIR2032 coin cell 3.6v ( www.amazon.com/.../B074VX8ZJF )

I measured power of this and it is 4V.

I'm going to use this coin battery, Does this cause any problems?

If this causes problems, what dose i have to do it?

[Martin Lesund]

Hi Hongpal,

  The max recommended voltage for the coin cell is 3.6V on VDD.

So if you want to use a coin cell battery with a voltage of 4V, you can use VDD_HV. 

You cannot put the battery in the "battery holder", you have to use the "LiPo header".

Read more about Power Source here