Does it need a battery to work?
1320686
Nope! All you need to do is plug it in to your microphone jack on your computer! :D
1400907
Yes. Plugs in or runs on battery. I've found the battery to last about 8 hours
1283248
No, it does not require batteries. Just plug it in. It has a nice storage area for the cord underneath also.
119788
It does not. It's far and away better than a popular model that does use batteries.
166982
no. But I have mine plugged in beside my chair. Just turn it on when needed. I have never put batteries in. If you travel you might want the battery option.
68007
It does not require batteries, but does have to be attached to a USB port. This company offers a different version which is what you are looking for.
1668088
It doesn't require batteries. It must be plugged into an electrical outlet.
2202955
No. You will either need to purchase the battery pack it a large pack of AA batteries
187400
Nope. It works without any external power source and yes it works just fine.
736513
No. Also the battery that comes with it works for all of 5 minutes. Buy some batteries
760179
No just with the battery....works well though for quite a while....recommended
238040
No. Just connect it directly to the battery. It works great for me. The battery is always filly charged.
1426962
Yes it requires a battery. It uses very little energy even with frequent usage. I've had mine for a year and haven't needed to change the battery yet.
567198
It does not come with a battery. It has to be connected to either the starting battery or house battery.
658324
No, it does not need batteries. I assume it operates on the current from the batteries being tested. They warm you to not prolong testing of a battery as it can run the battery down. It takes just a split second to get a reading.
242895
Mine did, but be sure to turn it off when not in use or the battery doesn't last long.
1801184
no, it does not run on batteries, it needs to be plugged into an electrical outlet