what is the power source ?
1019192
Hi Bruce, A Small Watch Battery, Not Sure Of The Number, I Have Checked Google And Can't Find The Battery That The Clock Uses, Sorry Neal
1891565
there is an input + and an input - those connect to the power source, the output + and - connect to the load or whatever you are supplying power to.you can connect through the solder hole and/or with the blue screw terminal.
1712860
It does not use any battery. It connects to your source and the power is derived from your source i think.
1230799
It uses wall current and can use batteries. Wall current should be your primary source as batteries don't last very long in this device.
723329
The power supply is an option. It uses a 9 volt battery (not supplied - no surprise there). When the power supply is used, the battery functions as a back-up.
1694654
There is no power source. It uses the pressure of the water supply. I followed the hookup directions that came with the pump, and it works great. Instead of the drip, drip, drip, the pump goes "ffftt, ffftt" occasionally.
1588074
Long cord plugged into power source.. I use an extension cord to plug it into my garage's outlet.
282169
you can use a battery or a transformer or the low-voltage output terminals of a circuit board -- basically any source that provides AC or DC in the specified range.
286116
It is just a 9 volt DC power supply Powered by 110 ac electric current. That's All!
15121
It's got a power supply with it. I have that plugged into my power strip...
2237836
It's powered by the USB cable it comes with. I'm happy with this hard drive. It has an extra usb power cable if main usb output is not giving it enough power
576352
Yes, it has a power port for an external power source, although I have not yet tried to use it.
1391875
you don't need a power source, the display goes when you cycle. comes with a battery.
105124
No, you do not need a separate power source. The cooling pad can be powered through a USB port on your computer. I choose to use a separate source to keep the USB port open for other devices.
1243229
I'm not sure I understand your question. It is an electronic device so it needs a power source. The battery is built-in, and can be recharged through a USB port on a computer or laptop.
630042
It both charges and is power source. I think it works fine. No problems since purchase.
555775
The power supply is via standard micro usb. It comes with a micro usb cable and a 110V Plug adapter with a usb plug to plug in a usb cable.