Does it have to stay plugged in?
449057
No it does not. You program your vehicle while it is off and follow directions on screen. Unplug it when done.
449058
No. You plug it in, it downloads your stock information, then you upload the tune that you want. Then unplug it and your done.
449059
No it is simple to install the program you desire and when finished it will tell you to unplug.
845171
Yes, you can leave it plugged in and ready for use. However, I found that you do not need to worry about it discharging without it plugged in and just siting there unused. It is amazing that once charged, it holds that charge for a long time. This is a fantastic product. It is better than any others that I have owned previously.
798283
Yes, this switch does need to be plugged in. There is no on/off switch so it is always on unless you unplug it from the wall. It is a high quality switch. I did a review and gave it 5 stars.
1191887
Several hours. Check the item description. and google the item title for blog discussions for more details. I think it also matters on what you hook up to it, but I'm not certain. It's also ok to keep it plugged in while it is in use.
1137054
No, I keep mine plugged in whenever I'm not using it and it still plays for 7 hours or more on battery.
378200
Yes and no. It needs to be plugged in to charge the device but after its done charging. You can used it without it being in the plug in.
1055224
I believe so, although I haven't had any issues just leaving mine plugged in all the time.
226773
It always need to be plugged! the device does not have an internal battery, but it works great!
2256709
Does not have to be plugged in all the time. Just after using it and every 30 days. I don't know how much current it uses but you can keep it plugged in and it'll stop charging it once it's fully charged
726839
It doesn't have to be plugged in while using it. I've had this for a few years. The main downside is the charge doesn't last long at all!
1711965
No, this has to be plugged in. Frankly, though we found one mosquito inside, I would not advise purchasing--a bit too small, really not that effective.
1265409
Yes. You can keep it plugged in and it will only heat as needed. I only unplugged it in the late spring after night temps were way above freezing. Worked great all winter!
2262182
no it does not stay on while it's plugged in. the light only comes on when you're touching the end of the cord with your fingers.
1155924
No, you'll have to charge it for a few minutes and then leave it plugged in to use it.
1164837
You could leave the unit plugged in until you need it but it's not necessary. It holds a charge for a very long time. You won't be disappointed. I purchased this for my husband three years ago for Christmas. He still says this is his favorite present, EVER!
1801580
No. Once it's plugged it will turn on perfectly. Once unplugged, it will turn off and rest.
513215
I always have it plugged in when I use it...sorry but I can't answer your question.