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Old September 14th, 2011, 04:17 AM   #1 (permalink)
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Default Won't Re-charge? How to fix it.

I've had my Tab for about 10 months. A couple of days ago, I thought I'd run the battery down. But I could not get the device to recharge.

I'd plugged into my work computer's usb. Didn't take a charge. My car charger: wouldn't take a charge. I'd even left it plugged in for 24 hours to my home computer, but still no luck.

The solution: charge in on the Samsung USB charger.

As you probably know by now, the Galaxy Tab needs a 1.5 amp USB power supply to charge at full speed. It will charge slowly on a 0.5 amp USB power supply as long as the device is powered down. And it will run without depleting the battery as well, but will not recharge.

One more wrinkle apparently: if you totally discharge the battery, then you will need to charge it on a 1.5 amp charger instead of a 0.5 amp charger. Kinda relieved. I thought I'd lost it. :-P

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Old September 14th, 2011, 10:53 AM   #2 (permalink)
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As an add on to this, In order to get the full power (1amp or higher) pumping into your Tab, the charger has to be "special".

There are a set of resistors inside "genuine samsung" chargers that tell the tab it's okay to draw full power. If the Tab doesn't get that signal it seems to "step down" to 500mAH or so like you'd get from a USB port.

So how do you tell if it's a "special" charger? Watch your charging indicator. If it shows charging you are good to go. If it shows a "data" connection then it's stepped down to the 500mAH limit and is basically "trickle charging".

More info here
http://forum.xda-developers.com/showthread.php?t=903262
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