need batteries when not usb? what kind?
1253848
Not sure 'cause I bought this for someone else. But the batteries when charged last about 5 hours then you need to charge through USB. It works via bluetooth
1253849
It does not use batteries - just recharges with a mini-USB. I get about 5 hours of playing time before needing to recharge but I don't let it run all the way out so it may go a little more. I really like it. Glad I chose this one. Nice clear sound and enough volume for a small area. Also very easy to use.
1253850
It has an internal battery. No need to add your own. Lasts for at least 10 hours between charges.
939635
Yes you an with a simple USB cord... A tiny one was included....the battery last quite a while tho
2044009
It is battery operated with no usb power option. It uses AA batteries. I bought it to use with cheap headphones and my tablet on planes. It works great for that, plenty of volume, 3 ports for others to watch with you and the batteries last much longer than I expected them to.
1277171
Its USB, since it has lights, it needs the power from somewhere and 3.5 jacks don't cut it.
172241
I'm using my desk right now. Three small batteries are the power source for the lamp. They are included when purchased. There is not a USB connection.
1734230
HI, this type is not with USB cable, the description have some problem, it have an power adapter, need connect with a power. it is not the USB type, not need the battery, thanks
329283
It can be plugged in via USB as a webcam, for file transfer, or printing, but there's no way to use it in "normal" camera mode without the battery. USB is the only external power source - and works without the battery - but only as an external webcam connected to a computer.
2031446
Never heard of a USB battery. Mine didn't work when I first hooked it up to my computer. Found out it came with a bad cable. With another cable I had laying around it works extremely well. You have to have it hooked up to your USB port on your computer to power it and also to receive WI FI.
1174901
Plug the usb from the lapdesk into your laptop and it should work. No batteries. Make sure your laptop speakers are running off the usb.
1519289
The USB connector is only for controlling a PC via USB, not for powering. It's not very power-intensive and putting in a fresh set of batteries is easy.
1611307
The USB port is intended for a memory stick, not for charging, so do not expect much current.
1448247
The USB will also charge a battery in the camera. An external charger not required.
1508050
No Usb needed However this is not too reliable maybe a different brand may work.
458505
i hesitated a bit after seeing reginald goodman's answer. mine was powered with the USB for the conversion operation (so is the much bigger one i bought elsewhere. batteries are not necessary), but i THINK i remember seeing a battery compartment because you can carry this thing around with you and the batteries may become necessary then.
1172413
They sell power supplies at computer stores. Now they are small and can supply computer's, radio's, or MP3 players with power when batteries are gone. I would check "Power Supply" in Amazon. There you should be able to find a lot to offer you what you need at a good price.
2173910
it has an onboard battery that needs to be recharged USB. Works pretty well for the price.
998192
Well I wasn't even aware it needed batteries. I no longer use this anyway since I have a Mac.