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I constantly have the yellow light showing on the top right of the screen. Which means that the pi doesn't get enough power. I have a 5 volt and 2,1 amp adapter. Is this bad in anyway or could the pi break? I'm using It for a bot on google chrome which bets automatically for me on a cs go betting site.

Wolle
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In contrast to other comments, the Pi will run quite happily with voltages down to about 4V. The SOC and SD Card run from 3.3V supplied by an on-board regulator, but USB peripherals may be affected. Not that I recommend this, as it is a symptom that something is wrong.

You don't say which model Pi; they vary. As you have a "yellow light showing on the top right of the screen" (actually meant to be rainbow - warning) you obviously have an old OS, and may have an old Pi. There was also a over-temperature warning, but I have never seen it. This too has been replaced by a thermometer icon.

You should use a proper supply AND cable. See Raspberry Pi Power Limitations

Community
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Milliways
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Under-powering a Raspberry Pi is quite bad.

Usually, symptoms will start showing up with usage, due to the SD card becoming corrupt. This can happen systematically slowly over time, or very rapidly depending on where the corruption on the card occurs.

The results can be lost data, corrupt files or at worst, an un-bootable Pi.

stevieb
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PI3B AND PI3B+ are very picky about undervoltage. Voltages on the input must be over 5V otherwise it shows the undervoltage symbol. It still works fine but at almost half of the processing speed.

bjurg
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