Don't measure current without a load
PROTIP of the Day: if you want to measure how much current can your USB charger provide, you have to connect it to an output first. Because current means electrons running around, and if electrons are running around freely, they are going to run too fast and blow the charger.
PROTIP of the Day: if you want to measure how much current can your USB charger provide, you have to connect it to an output first. Because current means electrons running around, and if electrons are running around freely, they are going to run too fast and blow the charger.
Source: me learning elementary physics empirically.