Keweisi USB Voltage Detector Review
Purchased from Ebay for $3.00 and worth every penny even after the long wait for shipping.
Amazon: https://tinyurl.com/kdlycvd
Ebay: https://tinyurl.com/nxko3x9
Electronics today are just too expensive to trust to 3rd party and knockoff chargers.
Test them before you use them and save yourself a costly mistake.
Easy to read and test any USB charger up to 3amps.