I have built an Arduino that works completely fine off my laptop power via USB but the second I plug in a 9v battery that works fine elsewhere everything stops working here is there any sort of solution to this?
If the 9V battery is a PP3 type then it almost certainly is not providing enough voltage at the required current as they are very low capacity batteries intended for low current applications such as smoke detectors
Can you measure the battery voltage when it is connected to the Arduino ?
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Make sure that the 9v is connected to the RAW pin.
But I agree with UKHeliBob. a 9V battery is unlikely to provide sufficient power or for very long.
A battery pack of AA batteries (say 6 to give 9V) would last longer. But still it's not that great.
Using rechargeable AA batteries might be an idea?
Use a voltmeter to test the battery when it is connected to the Arduino. Try using 12 volt wall adapter or a 12 volt lead acid battery, those should provide enough power. Remember if your Arduino doesn't have a socket, The 12v+ goes to the vin and the -- goes to gnd.
Dont worry the problem is solved now because I switched to a 5 volt 2.4 usb power bank
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