I left it to charge my s3 overninght. When I woke up in the AM, the charger was off and my s3 only 89% charge. Why? Charger has auto shutoff?
46857
I think you never pressed the ON button, you can charge this battery while charging your phone but you have to check it is on and charging.
46858
This is a normal behavior with battery extenders and overnight phone connections.. Modern cell phones and lithium batteries don't continuously charge, they stop when they get to 100% and then start again at 97% or so. This means once your phone is fully charged it stops drawing power from the charger, and the charger shuts off. So 30 minutes later when your phone battery is low enough to try to charge again the external power isn't there.
46859
This is a normal behavior with battery extenders and overnight phone connections.. Modern cell phones and lithium batteries don't continuously charge, they stop when they get to 100% and then start again at 97% or so.This means once your phone is fully charged it stops drawing power from the charger, and the charger shuts off. So 30 minutes later when your phone battery is low enough to try to charge again the external power isn't there.
1074533
I bought 2 of these on EBay but I don't remember the seller. Both of them worked but one had a defective charging port. I bought the second one to replace the one with the defective port. I have found this to be a "flakey" arrangememt, at best, and I found that the S4 must be in charging mode for it to work at all. Hope this helps.
1383212
Mine was working great after few hours charging. After a year and half, it did not charge like yours. I used to buy used one and used every week, so I gues it died. I used for long and good. But if it is new, then you need refund it
52798
I have a S3 and does well. Any unit it seems that is critically low needs to be turned off before a charge will take
1023553
As like anything else that doesn't have an auto shut-off, Yes, it will continue to use Power while charging at the same time!Always remember to turn it off!It will still charge, but, it'll take quite a bit longer with it on than off!I hope this clears things up for you.
546984
I don't usually let the battery below 20%. One thing I have learned is that some chargers will burn out a battery if left plugged in continuously. Unplug when charged.
1943347
I think it has to do with the mAh output. It does the same to me. If I plug it in at night it will be at 100% by the morning. But if its going dead and I'm on it, instead of charging when I plug it up like it would with the original samsung cord, it will die! So like I said it has a lot to do it the output of the charge. Hope I could help.
1703061
Only very slightly... but, that isn't unique to this charger. Like another person said, my phone is set to go to lock-screen and then sleep (turn off the screen) after 2 minutes, so it isn't just idling away while charging at the same time.
1934944
My red indicator light never has gone off. I am not actually sure of this, but I simply leave the charger plugged in (AC mode) in the evening, then take it out of the charger next morning. I don't see any indication of overcharging or battery memory developing.
1567180
Yes, that´s a bug, I noticed it while charging my S5. After fiddling a bit with it I managed to position it right on the sweet-spot. Other than that, if you use a case, maybe the distance among the charger and the sensor on the phone may be the cause.
928403
Hello Jeff, it will turn off automatically! I have been using mine for over a year and have had no trouble leaving it to charge overnight
251355
It stops just fine. I've left it plugged in overnight, but I wouldn't leave it like that to be on the safe side. It's a 'smart' charger.
1099454
I didn't know it turns off. I think that maybe you didn't have the charger lined up right on the contacts. When its charging there is a status bar indicating what percentage the charge is up to.
2103406
when i initially got the item i charged the battery for four hours anything after that and the battery gets pretty hot, now when i charge the battery , since i only have one smart charger i charge one battery with the smart charger and charge another battwery with the stock charger, when the smart charging is complete i disconnect the stock charger, works for me. it pretty much lasts for a while, ev3n after i put it away after use, it's still charged when i use it again a few days later.
1100771
It is suppose to be a smart charger, that is, it is advertised that it will charge your battery and then shut off after a full charge. It also states that the indicator light will be RED for charging and then turn GREEN when done . The one I received will not change colors and according to Amazon's customer service it will not do so, even though some reviews state that it will. So is it a "smart charger" or not I don't know and apparently neither does customer service. Who wrote the reviews that said it does ?????? Your guess is as good as mine!! For 14 dollars if you need a charger it will work, but I suggest you use a time set for 8 hours since Amazon won't back it up! It is suppose to be a smart charger, that is, it is advertised that it will charge your battery and then shut off after a full charge. It also states that the indicator light will be RED for charging and then turn GREEN when done . The one I received will not change colors and according to Amazon's customer service it will not do so, even though some reviews state that it will. So is it a "smart charger" or not I don't know and apparently neither does customer service. Who wrote the reviews that said it does ?????? Your guess is as good as mine!! For 14 dollars if you need a... » Read More It is suppose to be a smart charger, that is, it is advertised that it will charge your battery and then shut off after a full charge. It also states that the indicator light will be RED for charging and then turn GREEN when done . The one I received will not change colors and according to Amazon's customer service it will not do so, even though some reviews state that it will. So is it a "smart charger" or not I don't know and apparently neither does customer service. Who wrote the reviews that said it does ?????? Your guess is as good as mine!! For 14 dollars if you need a charger it will work, but I suggest you use a time set for 8 hours since Amazon won't back it up! « Show Less
2067105
The output amperage is too low to fully charge a Galaxy S3 or S4. The lower the Amperage the longer it takes to charge a battery. In fact, Anker has the following statement on the Amazon web page for this item, "Can NOT fully charge batteries for the Samsung S3 & S4". If it says that, why would you buy it for a Galaxy S4?
1294037
I cannot say what is wrong with yours...but I just tested mine. The extra battery charged fine in the cradle portion of the device. I then attached a USB charging cable from the USB port to my phone and it also showed a charging current. So mine does appear to be working properly. Try a different cable from the USB port, and if it is not providing any power "out", then I suspect your item may be defective.