The number of devices I own that require USB power keeps increasing. And so do the number of USB power sources to run and charge these devices.
The problem with many USB power sources is the limited current for each port. Some devices with four ports will share an 2 amps. This means multiple devices can require more than 2 amps and weird things can happen. I found this out recently when I plugged three devices into the same 4-port USB power source and all three devices started acting strange with flashing screens, noises indicating a charge and no charge. The problem was not enough current (amps) to support those three devices combined.
What i needed I found in the Anker 6-port, 60 watt, power supply. Each port has 2 amps of power. Check it out:
There are other brands that look similar. Be sure of the power rating for each port.
— Bruce Miller