How does it draw power? Most other units have an AC adaptor.
1516219
It doesn't draw power. It has an internal battery which is charged with a USB cable and supposedly lasts 6 hours between charges. Haven't had mine long and haven't used it enough to know if it really lasts a full 6 hours.
1516220
It pulls power from the 30 pin dock you hook it up to, then stores it in its internal battery. The unit comes with a 30 pin - USB cable, (an idevice cable) that you can use to plug into a USB port and charge it that way.
1516221
It has a rechargeable battery. You have to charge it with (an included) 30 pin adapter iPod cable. Or plug it into a stereo that would normally charge an iPod.
433281
Not sure of the "current draw" but it must plug into a 110V outlet. Probably not much draw as it only works a circuit board and small fan.
2005815
It draws very little current. I have driven 2 off usb power. If running from a micro controller such as an Arduino, you will need to connect to 4 I. O. Lines and 5v and gnd. Do a search on Google. There are plenty of tutorials on running it as well as some libraries that can be downloaded.
2112874
We use it for things that don't require a lot fo power. For example a cellphone charger or hair dryer (no a very powerfull one). For more powerfull things we bough other models (There is usually a label saying how much watts the device uses / converts)
1725802
It Pulls power from the AC unit, batteries are primarily for backup. Otherwise, no it can not be powered with a power supply.
1446522
It is powered by the USB port on your computer. There is no AC connection to worry about.
154299
you need to have access to 120v outlet; unit comes with transformer which plugs into 120v outlet and connects by small wire to the unit.
189157
It does not have a power switch. I want to say it does draw power when there are no devices connected, but not sure.
994483
No it doesn't. You would need an adapter. It might be well worth it if you have a frequent need to use you unit as it has been doing an excellent job for since we got it.
1920787
you have to wire it...but that would be unsafe as it draws too many amps for use with an adapter plug
1955004
Not sure what you mean by 'adapter'. If you're referring to AC power supply, yes it plugs in.
1827851
It is powered by a proprietary AC adapter and cable. It is not USB powered, and has no USB ports.
596328
It only draws what is needed. If it drew it maximum power all the time regardless of the load, it would be a pretty bad power supply.
1833260
Yes, it has an ac adapter. The attachment to the unit is like a miniature shielded mike jack. I have not seen a power plug of this design before. It is not a standard jack or usb input. It has a round shield and three pins. The shield is dimpled so that it only fits one way. The transformer has wires coming in and out so the plug in doesn't take up space on the wall or on your power strip. It has 120 VAC input and two outputs: 18.5 VAC 250 mA and 3.0 VAC 100 mA. There is no on/off switch on the board, so when it is plugged in, there is a bright blue light that shines showing that it is on. The only way to de-energize the board is to unplug it at the board or at the power source. Yes, it has an ac adapter. The attachment to the unit is like a miniature shielded mike jack. I have not seen a power plug of this design before. It is not a standard jack or usb input. It has a round shield and three pins. The shield is dimpled so that it only fits one way. The transformer has wires coming in and out so the plug in doesn't take up space on the wall or on your power strip. It has 120 VAC input and two outputs: 18.5 VAC 250 mA and 3.0 VAC 100 mA. There is no on/off switch on the board, so when it is plugged in, there is a bright blue light that shines showing that it is on.... » Read More Yes, it has an ac adapter. The attachment to the unit is like a miniature shielded mike jack. I have not seen a power plug of this design before. It is not a standard jack or usb input. It has a round shield and three pins. The shield is dimpled so that it only fits one way. The transformer has wires coming in and out so the plug in doesn't take up space on the wall or on your power strip. It has 120 VAC input and two outputs: 18.5 VAC 250 mA and 3.0 VAC 100 mA. There is no on/off switch on the board, so when it is plugged in, there is a bright blue light that shines showing that it is on. The only way to de-energize the board is to unplug it at the board or at the power source. « Show Less
235304
No, it gets it's power from 110 volt AC house current. It supplies 12 volt DC current.
1960022
My units came with AC power adapters. Do not know about batteries I always use AC if possible
402078
As I found similarly with the design of their car adapter, which showed negligible draw on the car battery when plugged in by itself, testing this charger also exhibited no significant power draw on the AC line when not actively charging.Because it doesn't even use an LED indicator to display that it's on, which almost every other device in the world uses, it's quite efficient and can be simply be left plugged in without any concern for wasting energy.