Switching power to RPi, from USB to Battery, without powering down first.

Submitted by antoan on Fri, 11/12/2021 - 16:41

Forums:

Hi,

I'd like to know if it is safe to attach the batery pack to the monsterborg and switching it on, while the RPi is powered via USB cable. In order to keep the Rpi powered when USB power is disconnected.

I usually power down the Rpi when switching from programming (Rpi powered via USB, Batteries off) and testing/driving the monsterborg. I'd like to avoid that in order to keep some ssh sessions alive.

Cheers

piborg's picture

piborg

Sun, 11/14/2021 - 12:47

It will probably be okay, but we cannot guarantee it.

Basically there is a chance that upon connecting the second supply that the 5V rail will see a brief spike in power. This would most likely cause the Raspberry Pi to restart. If too large it could cause a problem.

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