Leave power on? Can I just leave the USB power "charger" plugged in continuously? Will a constant charge be a strain on the batteries? Sorry for this "newbie" question, but wondered if anyone had experience and/or opinions on this...thanks.... Leave power on? Can I just leave the USB power "charger" plugged in continuously? Will a constant charge be a strain on the batteries? Sorry for this "newbie" question, but... » Read More Leave power on? Can I just leave the USB power "charger" plugged in continuously? Will a constant charge be a strain on the batteries? Sorry for this "newbie" question, but wondered if anyone had experience and/or opinions on this...thanks.... « Show Less
351247
Thanks, PsychDoc. It'll be interesting to see what someone else at Logitech says. In the tech support world, sometimes we have to talk to several people before we finally get to someone who has the answers. Maybe, for you, the second time will be the charm. :-)
351248
The instructions do not indicate that that the keyboard switches off the current once the batteries are fully charged, so unplugging the cable to avoid overcharging and battery damage is advisable. All the LED's remain steadily illuminated indicating charging is completed, but current is still flowing to the batteries.
351249
I was wondering too. It says it will go 10 days on a charge but I would question that as well. I have a wireless Logitech mouse, which I love by the way, that says it's battery life is up to 18 months and I'm lucky to get a month out of it. From reading the reviews, when in battery mode , the keys do not stay illuminated and you have to press something to light them up again. I love the fact you can have a choice of wired or not. The battery can also be replaced if need be according to the rep. I have a Logitech keyboard as well that I have had since Windows 95 and it works as well today as it did then. I do have a cover on it so that may be a big part of that reason. I was wondering too. It says it will go 10 days on a charge but I would question that as well. I have a wireless Logitech mouse, which I love by the way, that says it's battery life is up to 18 months and I'm lucky to get a month out of it. From reading the reviews, when in battery mode , the keys do not stay illuminated and you have to press something to light them up again. I love the fact you can have a choice of wired or not. The battery can also be replaced if need be according to the rep. I have a Logitech keyboard as well that I have had since Windows 95 and it works as well today as... » Read More I was wondering too. It says it will go 10 days on a charge but I would question that as well. I have a wireless Logitech mouse, which I love by the way, that says it's battery life is up to 18 months and I'm lucky to get a month out of it. From reading the reviews, when in battery mode , the keys do not stay illuminated and you have to press something to light them up again. I love the fact you can have a choice of wired or not. The battery can also be replaced if need be according to the rep. I have a Logitech keyboard as well that I have had since Windows 95 and it works as well today as it did then. I do have a cover on it so that may be a big part of that reason. « Show Less
351250
Thanks for asking this question, Oscar. I was wondering the same thing, so I hope someone can give us the answer.
351251
I would say No! I've had this for approx 1 year (got it for Christmas 2011) I didn't like the delay in having to put my hand over it for it to light up so I just left it plugged in all the time. The whole thing just died this weekend. I'm now looking into replacing the battery. Otherwise I love this keyboard. Well, not this cheapy keyboard I'm stuck using for now until I can get new batteries. ugh!
780124
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. 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... » Read More 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. « Show Less
2062954
I would ASSUME the batteries are not drained while plugged in to the power supply (which does not answer your question - I realize that). However, you should ALWAYS take the batteries out of a unit when the unit is plugged for any period of time (or not in use for any period of time) because batteries will leak and ruin the device. I have had several sets of different brands of batteries leak in the last few years.
468140
Short Answer: Yes, you can keep it plugged in between uses.I tend to just keep it plugged in, if the charger is plugged in but not plugged into another device then it wont use any power. I do know that when a vehicle is off it will usually shut off as well, though one of the sockets in my Altima stays on so you can charge things while the vehicle is turned off.
1012835
The manufacturer suggest keeping the unit plugged in since it has an automatic charger that keeps the unit charged without overcharging. The other models they recommend charging immediately after use but do not provide a shelf life for the charge.
1936949
I don't believe it will hurt the batteries, but in general with Li-ion batteries it is a good idea to remove them after they are charged. They will hold their charge for months after being re-charged, so why would you want them left in the charger? It is always safer to remove the batteries and unplug the charger.
1035282
Lithium batteries hold their charge for months. You do not need to leave it on the charger. This battery size will recharge within 15 minutes. The charger is smart, it will not attempt to continuously charge it when it does not need to. Leaving it on the charger will not hurt, but due to possible liability they tell you not to, since product failure with this much power potential can start a fire (very unlikely, but possible).
1286583
Black & Decker says that these batteries can be left on their chargers indefinitely without overcharging. I don't know what would happen if you used a different charger.
1046865
No the charger won't drain the battery -- Nor will it maintain it... Batteries will naturally slowly lose their charge while sitting unused -- Plus sometimes dependent on where the batteries are being used (boat, Car etc.) there might be a slight discharge to circuit leakage . clocks, lights, and the like. Just plug your charger back in a day or two before you use the vehicle .
1567078
We leave them on a little while longer without noticing any harm - and nothing in the packaging of any charger I've had suggests you have to get the batteries off immediately. I wouldn't store my batteries there :) But all that happens is the light for the charged battery goes solid and the others continue charging if needed.
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.
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.
845170
While the JNCAir does have a auto shutoff for AC charging, it is still not recommended to keep it plugged in all the times. DEFINITELY do not do that if recharging with DC power. Recharging with DC power works, but there is no auto shutoff and the battery (and you) might get damaged if left in too long. Charging with DC is only for emergency situations. basically, just leave it plugged in about 20 minutes to a couple hours, depending on how dead the JNC is. ok, sorry I went off on a tangent..so NO, do not leave it plugged in charging at all times, only charge it if it needs to be charged
1348158
the battery has to be disconnected from whatever the battery is powering, otherwise you charge not only the battery but also the connected car/RV etc. This can be harmful to your cars electronic or the charger itself. I sell these chargers (6 volt version) with my battery powered pet fountains and had no complain over many years.
430482
I cannot answer that question. I think from all I have read about this charger it cannot overcharge or undercharge its built into the charger. I use mine to charge my boat trolling motor and when the green light comes on I always disconnect it. I have never left mine on to continually charge. Some battery chargers will damage the battery if they don't switch to the maintenance cycle. But once again I think this battery charger it's all built in to not overcharge. That's why I bought it. Hope this helps some. I am just telling you how I use mine and I have never left mine hooked up past the full charge. Sorry.
760249
I just checked the instructions that came with the unit. It states that you can charge USB devices on AC or battery power but in order to save battery life the unit will cease charging external devices if being played on a high volume setting during battery operation. Hope that helps. ;)
1683061
I will try to answer y our question- I leave it on the charger several hours and then it lasts for daysafter I use it again.I usually just put it on the charger at night and when I wake in the morning and use it. It just seemseasier to to it at night.