The trick is to put a tiny dummy load on the USB charger. Just buy the cheapest USB cable, cut the end off, and solder (or twist) a resistor between red and black. Boom.
Had a whiny USB power strip at my office desk that stopped whining when my phone was plugged in. Small resistor took care of that perfectly, cheaply, and nondestructively. Got a kick out of confused colleagues asking why I had a dangly cable plugged in with nothing but electrical tape on the end.
The trick is to put a tiny dummy load on the USB charger. Just buy the cheapest USB cable, cut the end off, and solder (or twist) a resistor between red and black. Boom.
Had a whiny USB power strip at my office desk that stopped whining when my phone was plugged in. Small resistor took care of that perfectly, cheaply, and nondestructively. Got a kick out of confused colleagues asking why I had a dangly cable plugged in with nothing but electrical tape on the end.