Power Management: Battery voltage

[Slaxx]

Hi
I'm currently experimenting on changing stuff in the NRF firmware. I'm however missing the part that checks the battery voltage. I found out that the battery voltage is measured and sent to the STM32 over Syslink. However the power management in the NRF chip is never checking the battery voltage for the appropriate range of 2.7 - 4.2V. Did I miss something? Or is the STM doing the power management for the battery?

[tobias]

You figured it right, the STM is doing the power management logic. We want the NRF to be as "dumb" as possible.

[Slaxx]

Ok thank you. That means though, if the board is not turned on for a long time and the battery is still connected, that the battery could be destroyed. Since nothing controls the battery voltage and the NRF is still consuming power.

[tobias]

Well that is not true as the battery has a protection circuit and will cut the power below ~2.8V. Also the power off consumption is only ~10uA so it can stay off for a long time.

[Slaxx]

Oh I didn't think about the interntal protection circuit thx.