Review on 🔌 Universal USB Wall Charger Trio - FONKEN 3-Pack, 5V 2A Power Adapter for All Devices: iPhone, iPad, Samsung Galaxy, Google Nexus, Kindle and More! by Angela Ryg

I bought these to power devices like the Raspberry Pi. Using a hint from another review, I tested the voltage at different currents. It starts off a bit high and gets higher as the current draw increases. This is typically used to counteract voltage drops on long or thin cables, but the increase is too aggressive and well above USB's 5.25V limit. It doesn't hurt what I use it for, but others may need to check everything is fine . Otherwise a great product.