Does it charge each cell separately? Hi, Can anyone tell me if this charger (which claims to have overcharge shut off protection) will shut off when the first battery is fully charged or can it detect and charge separately for each battery? No luck on the Sony website or other reviews/discussions.Thanks! Does it charge each cell separately? Hi, Can anyone tell me if this charger (which claims to have overcharge shut off protection) will shut off when the first battery is fully charged or can it... » Read More Does it charge each cell separately? Hi, Can anyone tell me if this charger (which claims to have overcharge shut off protection) will shut off when the first battery is fully charged or can it detect and charge separately for each battery? No luck on the Sony website or other reviews/discussions.Thanks! « Show Less
590551
Not true. You can charge any number (between 1 and 4) of AA cells at a time. You can even mix and match AA with AAA cells.
1482559
Yes, this charger will shut off individual cell's charging current as soon as that cell is fully charged. However, the indictor light only goes off when all cells are fully charged.
222902
Hi! I just read the little manual that came with the charger. It says the charger has Individual Maximum Timer Control for overcharge protection. By the way, I love this charger and think it works very well. Hope that helps! :)
846058
While this charger will charge two batteries simultaneously, it is different than the original charger in that the charger doesn't cut off when the battery is full and this may be because it never gets full. The charge doesn't seem to last as long and won't hold the charge when the battery is in the trimmer and not in use. It is still better than one battery, one charger when you have a lot of trimming to do.
634453
I do not have this charger anymore, but if I recall correctly: it will turn off. However as long as the battery is completely charged it is in my opinion just cosmetic. R.
935560
Hello. You are correct. It charges 2 at a time. I think its a fantastic charger/battery set at this price point. Hope this helps.
186885
You can see it as 4 independent battery chargers/health indicatores, and if each battery is NOT interacting with each other, I would say that it can be used to charge each batt independently, as well as a battery health indicator. I never tested the battery health indication w/o the AC connected. I charged different appliance battery sizes (from 4.5Ah to large 18Ah). I never used it large boat/car batteries, but I see no reason why it would not behave the same way.
412396
When the battery is charging the internal voltage increases. When that voltage reaches a certain preset point, the controller is supposed to shut off charging current. It seems to work that way to prevent overcharging. As far as discharge, there is supposed to be a diode in the circuit that prevents current from leaving the battery but allows current to enter the battery for charging.
988382
How long is a guess. I guess it's too expensive to put in a voltage detector for shutting off the charger when it is at peak. Yes, you can charge with it shut off. It asks if you want to continue charging when you shut down.
1438506
I bought an extra batt from Amazon as well and both batteries, the one that came with the phone (tmob s3) and the recently purchased one work ok. I think the newer battery is flaky. It only shows about 80% after charging overnight. Doesn't say that there's circuitry in the charger to prevent overcharging, but it does take a looong time to charge. IMO the slow charging cycle extends the life of the battery. There's a battery charge indicator light that shows RED when charging and BLUE when the battery is fully charged. Hope that helps.
51068
i believe the charger turns off automaticly after the battery is charged at least some do tho some chargers tell you that you are useing unnecesary electricity by leaving it on but i would suggest removeing the battery once it is charged.
1205729
Yes, you can charge one battery at a time. There is one comment worth mentioning-of these type chargers be very careful they are very cheaply constructed and can break easily - never force batteries in with pressure. Three of four of these charger have failed, the first was first time usage when frame broke, one just doesn't work after using it maybe half a dozen times, the third charger will not charge batteries. I like the batteries and have about thirty of them not one has failed as of yet. Consider the batteries as sold separately and find a better built charger.
1665889
Yup! I use it on my 12 Volt boat batteries and my 12 Volt car batteries. Like it because it shuts itself off when reaching full charge. My older chargers of a different make could overcharge a battery if left on too long. It is a tad slower than some chargers, but I believe a slow charge is better than a too fast one. I disconnect it when I notice a full charge is reached and in a few months will recharge the battery if the battery is left unused. Hope this helps.
2103598
I assume that you mean "does it stop charging once the battery is fully powered?" My understanding is that this one does that, and seems to keep the battery charged if it stays inserted. The small chargers that came with my tools did not do that.
1710618
When charging, the red light only turns off automatically (and the device stops charging) if the switch on the side is off as well. If you only turn off the top button, it'll keep trying to charge. Don't wait for an amber light indicating that the battery is fully charged... I find that to be misleading... at least it has never happened to me.
700384
I don't know of any battery charger that shuts off automatically. I usually leave my charger unplugged until the night when I want to use it. I found out from others here that leaving it plugged in all the time shortens the battery life. That's exactly what I was doing. Since you asked this question, I plugged in my charger with the battery and found out that when the battery is fully charged the red light on the front changes from bright red to a more dimmed red. Hope this helps!
2211255
Just a couple of guesses. I have two chargers - one never worked - thought it was the battery, but the batteries work when charged on the charger that works. Somewhere in their info I read that the batteries shouldn't be drained down to zero - has that happened?
1046588
Yes it shuts off when charged and also shuts power off to the charger until voltage in battery drops to a preset level. I am able to keep the charger hooked up for months without worry.