Will this drain my battery if I leave it plugged in all the time?
1572991
It might, depending on how often you drive, the temperature, and how old your battery is. The LED stays lit all the time. I found my battery dead after leaving this plugged in without driving it for about two weeks. But my battery is 8 years old and it was a colder day. If you drive more frequently and/or have a newer battery, it's probably fine. If you're the kind of person who keeps a diagnostic scanner plugged in, you probably also keep jumper cables or a trickle charger, so why not try it?
1572992
Yes, most of these draw .6 Watts at idle. Try to get one with a power switch so you can leave it plugged in all the time.If your battery is old or small, this could drain it within a few days.. .6 Watt/12 Volt = .5 Amperes. .5 Amperes x 24 hours/day = 12 AH/day.Many lead-acid batteries are only good for about 100 Ampere Hours (AH), so if your battery is a couple years old already figure you will drain it completely in about 8 days!And note that most lead-acid batteries are permanently damaged (reduced output) by a discharge of over 30% of their rating, so yeah, that could get expensive! Yes, most of these draw .6 Watts at idle. Try to get one with a power switch so you can leave it plugged in all the time.If your battery is old or small, this could drain it within a few days.. .6 Watt/12 Volt = .5 Amperes. .5 Amperes x 24 hours/day = 12 AH/day.Many lead-acid batteries are only good for about 100 Ampere Hours (AH), so if your battery is a couple years old already figure you will drain it completely in about 8 days!And note that most lead-acid batteries are permanently damaged (reduced output) by a discharge of over 30% of their rating, so yeah, that could... » Read More Yes, most of these draw .6 Watts at idle. Try to get one with a power switch so you can leave it plugged in all the time.If your battery is old or small, this could drain it within a few days.. .6 Watt/12 Volt = .5 Amperes. .5 Amperes x 24 hours/day = 12 AH/day.Many lead-acid batteries are only good for about 100 Ampere Hours (AH), so if your battery is a couple years old already figure you will drain it completely in about 8 days!And note that most lead-acid batteries are permanently damaged (reduced output) by a discharge of over 30% of their rating, so yeah, that could get expensive! « Show Less
1572993
no it will not drain your battery, my has been plugged in the truck and stays there, i drive this truck maybe once a week, never any problems
1368124
yes it will still power whatever its plugged into and if power is being used it can drain the battery
1536598
Yes. I leave it plugged in since I use it at home. If the battery runs out, it will take some time before it charges enough to use again. I expected it to work as soon as I plugged it in but it didn't.
499242
Yes. I leave it plugged in all the time since I leave it connected to my TV. Still working great. Used it today.
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
531704
The person I purchased this unit for, leaves it plugs in at all time. She unplug unit for several day while on vacation, and the battery died. So I suggest you leave unit plug in at all time to preserve the battery life.
1310490
If you are wondering wether your can plug it so that you can continue using it right after the battery discharges, then the answer is no. It will work while plugged in only if the battery has still some charge in it.
1158258
Yes. I usually just leave mine plugged in unless I am going into another room for a short time
1151774
I can't answer that question in any certainty. But I do know that there a tendency for the battery to drain, and so for that reason I always unplug mine when not in use.
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.
1458839
You can keep it plugged in all the time and you won't damage it. I think it takes at least 20 hours to fully charge it, after it's been totally drained of it's power.
1137054
No, I keep mine plugged in whenever I'm not using it and it still plays for 7 hours or more on battery.
368225
I leave mine plugged in at all times. I have two right now that are always plugged in.
206821
No it will not drain its made to be left hooked up to your batterys, just plug in when you want to charge them
531706
I leave mine plugged in all winter and it's fine. I don't think it's a drain on the battery to leave it plugged in.
1184393
It is OK to keep it continuously plugged in. When the Cyren is off and fully charged and USB connected to 5.14V, it draws 0.00 Amps (I have a USB volt-amp meter). The battery is being charged only when it needs to be charged, and that is good for the battery.
531703
I leave mine plug in all the time. It only charges when their is sufficient light. It also works under some lights at night.