Does it really shut off when a full charge has been accomplished? How can it tell?
2006935
Shana, From what I have read (may be wrong), regular chargers pull energy even when not charging a device and they say they pull a lot of energy. This one does not pull power when your device is not plugged in. Your smart phone should control when it needs charging and stop when at 100%. I really like this charger; you don't have to worry about someone misplacing it. Also, easy to install. The top port is a fast charge and has a green light when charging. The bottom does not. I also ordered these and love them: Magic-T Bundle of 10 Durable Braided Nylon 3 Foot Micro USB Sync Cable Charging Cord for Samsung Galaxy S4,S3,S2,HTC One X, One 2(M8),Nokia N9 Lumia 9 Great deal. Hope I helped.
2006936
Shana,From what I have read (may be wrong), regular chargers pull energy even when not charging a device and they say they pull a lot of energy. This one does not pull power when your device is not plugged in. Your smart phone should control when it needs charging and stop when at 100%. I really like this charger; you don't have to worry about someone misplacing it. Also, easy to install. The top port is a fast charge and has a green light when charging. The bottom does not. I also ordered these and love them:Magic-T Bundle of 10 Durable Braided Nylon 3 Foot Micro USB Sync Cable Charging Cord for Samsung Galaxy S4,S3,S2,HTC One X, One 2(M8),Nokia N9 Lumia 9 Great deal. Hope I helped. Shana,From what I have read (may be wrong), regular chargers pull energy even when not charging a device and they say they pull a lot of energy. This one does not pull power when your device is not plugged in. Your smart phone should control when it needs charging and stop when at 100%. I really like this charger; you don't have to worry about someone misplacing it. Also, easy to install. The top port is a fast charge and has a green light when charging. The bottom does not. I also ordered these and love them:Magic-T Bundle of 10 Durable Braided... » Read More Shana,From what I have read (may be wrong), regular chargers pull energy even when not charging a device and they say they pull a lot of energy. This one does not pull power when your device is not plugged in. Your smart phone should control when it needs charging and stop when at 100%. I really like this charger; you don't have to worry about someone misplacing it. Also, easy to install. The top port is a fast charge and has a green light when charging. The bottom does not. I also ordered these and love them:Magic-T Bundle of 10 Durable Braided Nylon 3 Foot Micro USB Sync Cable Charging Cord for Samsung Galaxy S4,S3,S2,HTC One X, One 2(M8),Nokia N9 Lumia 9 Great deal. Hope I helped. « Show Less
1056728
Yes! It will tell you it's fully charge when the battery is 100%. It will also tell you to unplug the device.
168594
It shows that the power is successfully connected. It goes out but never lets you know when fully charged. Sorry, I just let it go for a few hours.
1762658
My experience has been that the light is on when it is working. I don't know if the light goes out when the battery is fully charged.
976472
I will add, when you are not charging your phone or when your phone is fully charged, make sure you remove cord from the charging device altogether... The device doesn't have a shut off capability. If there is a cord plugged into device, it starts using its power if it the cord isn't hooked into anything else. If your device is hooked to your phone it doesn't stop charging at 100%. The only way to shut off device is to detach everything from it
990901
The light does turn off when charging is complete-- I just tested mine and it went from Amber to off to indicate it's charging state.
1871968
There is an indicator light that blinks while charging and is solid when fully charged, but it does not tell you when it is dying and needs to be charged... In my experience, it is good for one full charge at least.
1047496
It's my wife's she turns it off when it's at 4-5% and she shuts it off at 100% but she noticed sometimes till shut off automatically when the phone is fully charged
1972908
I have left my phone on it for hours while the phone was powered on but I have noticed when the phone is off and when it is done charging, the battery pack shuts down automatically so if your phone is off, my guess would be that it shouldn't. Not sure how it would be if the phone is on. Maybe it works the same as it detects the battery is fully charged it may shut off either way as to not overpower the phone.
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.
503043
No. It stops after the item is fully charged. It will then "trickle charge" to keep the battery charged, but not overcharged.
1014411
Hi, it does shut down so it doesn't draw off battery power. I made mine I to a portable meter for installs and that saves my portable battires.
558614
I've never had this issue. You know it is fully charged when the light quits blinking.
906292
Don't know at what number it turns off, but it will automatically shut off when it is just about dead. Auto shut off when the device its charging is full too, or when you unplug something it will stop after a short while.
833288
This charger does have an auto shut off feature that's suppose to shut off the charger to prevent overcharging. I haven't needed that feature, so I can't tell you how well it works, only that's it's available.
1731821
Mine also never shut off which led me to believe it never charged to full. I tried charging my Nexus 7 and it only charged it to 93% before running out of power. Maybe I got a defective unit
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.