Can you leave this unit plugged in for long periods of time (months / years) without damage to the internal batteries until you actually need it so that it is always 100% until needed?
448100
it does have an auto stop when charging with AC. The light will go from red to green to let you know it is fully charged. You can leave it plugged in without damaging the unit. You can not do this with DC. as with your car lighter socket. You can overcharge the battery and damage it. Hope this helps.
543310
I know if you leave it plugged in all the time it can end up ruining the battery. But if that is not the case then I would contact the manufacturer.
1570397
I disassembled an old unit that failed to charge after a year or so and removed the batteries. They would not charge with a "hobby" charger designed for electric RC cars and such. I then discovered that storing the unit in the charger when it is plugged in was overcharging the batteries. I have another unit about 4-5 years old that is still going strong. I charge the batteries overnight when they will no longer last a full brushing cycle. NiCad and NiMH batteries have a very limited life when charged to 100% capacity repeatedly.
1270271
I'd not assume it's safe to leave it plugged in unless you see a statement saying that it is. In fact many manuals will say "Don't charge for more than 24 hours" or "Don't overcharge" showing that you shouldn't leave it on. If your thinking of that so it has a routine "fresh charge" that you don't need to think about doing regularly I'd get a timer that turns it on for just 15 minutes a day and/or a regulated power supply (like the Schumacher PC-6 or Coleman powerchill cooler AC supply) that won't "overcharge" it.
503416
You *can* keep it plugged in, but it's not good for the battery. It's better to charge it, then let it run on battery. It warns you about 9 days before the battery goes (when you go to take your temp in the morning, you get a "BA09"... the next day "BA08" etc. But it still functions on those days. I think I charge mine overnight about once a month? So, you COULD leave it plugged in, and it would still function, but my understanding is that you'll reduce the longevity of the machine. (When you need to rely on the battery, the battery life might be compromised.)
2244648
No, you should remove batteries when they are fully charged. The unit has built-in protection to prevent overcharging but why put it to the test continually? The risk of fire far exceeds the benefit of having a fully charged battery.
1035277
Yes but generally speaking the manufacturer recommends leaving it in the charger only until it is fully charged.
360820
I would say to leave the battery in the unit. If, on the other hand, you were putting the unit away for several months then it would make sense to remove the battery to both reduce drainage and to avoid possible leaks in battery fluid (not likely but it has happened to some of my flashlights and an electronic device when batteries were forgotten for more than a year).
49452
According to the manual the unit can be left plugged in when it is not in use. If not left continuously plugged in it should be charged after each use and once a month otherwise.
199039
It does seem to damage thr battery if you don't use it all the time, if used all the time no problem leaving battery plugged in.
2130972
You can leave it plugged in. The manufacturer suggests that you unplug it once a month for approximately 30 seconds to reset the sensing circuit.
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.
2105226
I keep mine plugged in all the time but it may not be necessary. I love mine!!
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.
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.
2227831
I have had this unit for at least 2 years, have used it and used it and used it, and then will go for long stints without using it, and it's still charged fully and ready to go. This is a great unit. I have used EasyAcc stuff for years and they still work like new. I will say that if you leave it plugged in all the time, you will lose a lot of functionality (right?). They need to be used in order to work right. Maybe that's why mine lasts so long - I use it like crazy, then put it up for a month. Then back out to use, charging up, draining down . . . repeatedly. It's a great unit. Can't go wrong. I have had this unit for at least 2 years, have used it and used it and used it, and then will go for long stints without using it, and it's still charged fully and ready to go. This is a great unit. I have used EasyAcc stuff for years and they still work like new. I will say that if you leave it plugged in all the time, you will lose a lot of functionality (right?). They need to be used in order to work right. Maybe that's why mine lasts so long - I use it like crazy, then put it up for a month. Then back out to use, charging up, draining down . . . repeatedly. It's a great unit. Can't go... » Read More I have had this unit for at least 2 years, have used it and used it and used it, and then will go for long stints without using it, and it's still charged fully and ready to go. This is a great unit. I have used EasyAcc stuff for years and they still work like new. I will say that if you leave it plugged in all the time, you will lose a lot of functionality (right?). They need to be used in order to work right. Maybe that's why mine lasts so long - I use it like crazy, then put it up for a month. Then back out to use, charging up, draining down . . . repeatedly. It's a great unit. Can't go wrong. « Show Less
1537555
You can leave it in as long as needed. The light will change color when the battery is fully charged. However, once it is fully charged, it should be removed because overcharging can damage the battery and shorten its life.