Hum noise

[stahlhelm98]

Hello! Using PowerBoost 500 while powering raspberry pi there is a hum noise and after few seconds the raspberry is shutting down. When i power raspberry pi from another source everything is ok. Do you know what the problem should be ? Thank you very much! I use a LiPo cell 2600 mAh and a USB cable.

[NeonHorizon]

Difficult to say really.
Do you have a photo?
Also which Raspberry Pi is it?

[stahlhelm98]

Hello! Thank you very much for the reply! It is a Raspberry Pi Zero.

[NeonHorizon]

Is the battery fully charged?
From what you describe it sounds like the battery cant provide enough power but it looks adequate.

[stahlhelm98]

Is the battery fully charged? From what you describe it sounds like the battery cant provide enough power but it looks adequate.

The Li-Po battery is now 4.18V and it should be abe to provide enough energy (i belive) cuz it is a 9.62Wh battery. It`s weird because if I power a Raspberry Pi 4 there is no problem, it works properly and there is no hum noise.

Raspberry Pi Zero sucks about 150 mA when is starting but after few seconds green LED go off and rpi sucks about 70 mA and it doesn`t start

[NeonHorizon]

Very strange, I wonder if the load is too small?
Have you tried connecting an LED on the PiZero or something like that?