If you leave the unit plugged in, but you don't unplug it, will it harm the battery? Better for travel and not as a wall charger?
54026
It will and did mess up the battery. I sent mine back. But it was very convenient on the move. The charge takes much longer than plugging in. Dont believe the description.
263961
No. I love it but wonder if it will drain my battery if I forget to unplug :(
1035279
I do without any problems. The charger seems very high tech. I doubt it would hurt the battery to leave iit plugged in
704650
Yes, you can leave it connected all of the time. It'll automatically stop charging when the battery is full. But why would you want to? The charger is always converting 110v AC house current to 12v DC battery charging current. That produces heat and wastes electricity (aka $$$). I unplug mine when the light goes green meaning the battery is charged.
1175495
Yes. You absolutely can. I use it while I'm traveling and it is the only charger I use while traveling. I found on a couple rare occasions I had the device switched on and it didn't automatically turn itself off and didn't accept the charge from the wall. Most of the time I don't have this issue and it recharges the battery as well as my connected phone and other devices.
1790863
Yes, you leave it plugged in all the time. I have had the unit for four months and it has been working fine. I have not had a problem with my car battery since I installed it. Hope you have the same results.
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!
324706
No leave the battery in the device. The circuitry detects if the device is receiving power and then charges the battery and runs the device at the same time. When the battery completes charging the unit continues to run on AC till you unplug from the wall socket. It is a nice feature that you can run it and charge the battery at the same time.
114918
I have tried it both ways, but it always seemed that when I left it unplugged and needed it, there was no power. Now I leave it plugged in all the time. However, probably like other devices of this nature, it might be a good idea to let it run out occasionally and recharge.
2160546
No, don't leave it plugged in. It will drain the battery. The green light is cool but it drains the battery slowly but surely.
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.
780121
Newer models have a voltage regulator so they can be left plugged in constantly, but older models didn't have that and could be damaged if left on too long, so you may get mixed messages about this. This is from the description here on Amazon: "The onboard battery automatically stops charging when it has reached a full charge--allowing you to keep the JNC660 connected to an AC outlet indefinitely without causing any harm to the battery." What I've done to insure I'm not leaving a few batteries I have "drained' but am also not leaving them plugged in 24/7 is set a timer on a charger to come on for 15 minutes a day, otherwise I "manual charge" them right after using them.
186552
Its been my experience that leaveing it plugged in after dark the charge likes to feed back through the carge controler and heat up why i dont know but it does i would reccomend unplugging it as soon as it gets daark just to be safe..it does get kinda hot!
2084285
No, you have to plug it in the charge it, but then you unplug it when you use it.
828761
Yes, you can leave it plugged in but it's a bit of a phantom drain. I have read where some fleet operators just leave a bank of them plugged in all of the time. But why pay for the electricity? I charge mine every thirty days (it's right on my bench) and it never falls below 100%.
928243
I think they say not to use it plugged in, but the charging time is a short four hours and the charge lasts for many hours, so the power it uses without being plugged in is more than sufficient to tackle the job.
1166437
I have left mine connected without being plugged in for a few hours without a problem. But I don't know about permanently I have never done that.