Do these batteries have over charge protection?
1366748
It seems so. I have left the batteries connected to the wall socket for hours and they have not suffered any harm that I know of. They still seem to work fine. However, I crashed my quadcopter pretty hard while I was learning how to fly it and that seems to have damaged the battery and now when I use that battery it seems to give power unevenly.
1366749
The charger that is used for these will automatically shut off when the battery is charged.
1366750
The part number on this battery is HW651744P. There is no overcharge protection built into the battery. You must use a charger with overcharge protection.
1835586
I have never had my batteries give me a problem nor have they ever ran a charge down. I do however believe you can replace them but if you have another problem like you didn't do a full charge before you ever used them, then I believe that would cause the charger to max out with less of a charge and never do a full one.
540407
I have no idea, I didn't keep my packaging, but I always liked Duracell because they hold a charge longer than most batteries. I took them out of the container and charged them up before I left for Europe. But in today's world, my best bet they probably were, seems most things are these days.
83579
Good question. Mine were black and protected for sure (slightly longer) than any of my non protected green label batteries.
382551
No it does not, BUT i've had it for about 3-4 years now and have never had a battery over charge. ALSO one key factor when wanting to run a dual battery setup is to start off with 2 new batteries that are the same make and model and pre-charge them before putting them on a vehicle.
14143
No problem with them. They are a lot better than the original battery that came with my Sony camcorder. Holds a charge longer and also chargers faster. Hope this help's you.
2207362
These batteries will hold a charge, we cannot guarantee a new or fully working battery. Since these units are refurbished. We do not warranty the batteries.
146067
Yes. While they seem to be somewhat tolerate to overcharging you can ruin them. I've left them for 12hr and had no problem. But when I forgot about one and left it for a day. It was ruined. It just wouldn't hold a long term charge anymore. I had used it quite a bit so it may it was just its time to die but all the others I've had have lasted a very long time.
172389
Maybe, but these batteries are falsely labely and have varying outputs, nothing like what is stated. Plus these batteries are not protected and can possibly burst. I should warn you that the charges can catch fire easily too. These are imitation batteries. They should be around 10$ for 1 quality battery.
2140771
No. They are 18650 batteries. Probably removed from a used up laptop battery.Ultrafire batteries are crap. You might get lucky, and get a good one, probably not.
1438086
Yes. I haven't used them very long so not sure how the charge from one compares to another. That's often a difficult thing to determine. So far, so good.
1148560
My batteries came close to fully charge. I put them on a charger and in short order they were full. I did a good amount of research before purchasing these batteries. You will be hard pressed to find a better deal that includes shipping cost. Shipping is fast and they are very well packed....better then expected. No issues.
440393
It may overcharge your battery though not likely.It does have a bypass diode which is only useful when connecting multiple panel in series. The diode has nothing to do with overcharge protection.You should consider adding a diode in series with the + lead to prevent leakage at night. Again this will have no effect on overcharge.It may be easier to add a charge controller.
871929
I have used these batteries for almost 2yrs now. I have had no issues with them at all. They charge quickly and last for days.
725603
They do but if your using it for a mod the MAH is to way to low that it'll die within minutes and it charges way to fast. Hope that helps
1457569
No, by no means they are OEM batteries. They are cheap and have higher capacity, but they do not last long. Mine only lasted about 1.5 yrs, which was disappointing. But for the amount of money it is still fine.Update 150228: I might have found the reason for the short life. The STK charger overcharges just slightly to 8.5V, this is within the 50mV tolerance for 4.2V each cell (511A has two), but never the less this is not good for the battery longevity. I plan to use Cannon charger, which goes to 8.3V, and hope the best. Will update the result after 1.5 yrs (which is Aug 2016). Wish us luck! No, by no means they are OEM batteries. They are cheap and have higher capacity, but they do not last long. Mine only lasted about 1.5 yrs, which was disappointing. But for the amount of money it is still fine.Update 150228: I might have found the reason for the short life. The STK charger overcharges just slightly to 8.5V, this is within the 50mV tolerance for 4.2V each cell (511A has two), but never the less this is not good for the battery longevity. I plan to use Cannon charger, which goes to 8.3V, and hope the best. Will update the result after 1.5 yrs (which is Aug 2016).... » Read More No, by no means they are OEM batteries. They are cheap and have higher capacity, but they do not last long. Mine only lasted about 1.5 yrs, which was disappointing. But for the amount of money it is still fine.Update 150228: I might have found the reason for the short life. The STK charger overcharges just slightly to 8.5V, this is within the 50mV tolerance for 4.2V each cell (511A has two), but never the less this is not good for the battery longevity. I plan to use Cannon charger, which goes to 8.3V, and hope the best. Will update the result after 1.5 yrs (which is Aug 2016). Wish us luck! « Show Less
1301188
Yes. If you look up Duracell Copper top C Alkaline Batteries 1.5 volt specifies that they have insulating protectors. Hope that helps.Laurie