Pis are pretty picky about the charger you use. You need 5.1V with at least 2A if you don't want undervoltage warnings or worse. That basically rules out any sp

Pis are pretty picky about the charger you use. You need 5.1V with at least 2A if you don't want undervoltage warnings or worse. That basically rules out any spare USB charger you have lying around (they are 5V).