I've tried a battery-powered USB charger (basically a battery with a built-in charger), and am having problems with clicking noises. Do you have any specific recommendations regarding battery PSUs (brand, availability?).
When the D7 is powered via a powered hub connected to the USB charger (battery powered), and IEMs are connected directly to the D7's headphone socket, a regular ticking noise is heard in the background, regardless of the volume setting or of whether a source (iPad) is connected or not. The ticking disappears when the charger is replaced with a 5V "wall wart".
I have these battery, a laptop and a this usb hub.
I want to know if it all work together. I want to supply the usb hub with the battery cause
I need to connect several usb devices on the go. The devices I want to connect are
gsm modems.
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