Why is there a red cross on the battery icon of galaxy tab though its fully charged?

your battery is defective. contact Samsung

It needs a new battery.

You have a contact issue with your battery. ..even plugging it in you must have a good connection with the battery. I would try this take a piece of cardboard or paper and fold and wedge it in between the battery and the outer edge of the battery recess not where the gold colored terminals are located. Sometimes the battery don't make proper contact and this will ensure that it does. After doing this plug it in and let it charge for a while. When the icon for the charging battery gets to about the middle of the battery then hold down the on button until the icon disappears let go of the button and see if it works ok

Try a different cable and a different charger if you have them. Also try just connecting it to a PC's USB port. Of course, the PC has to be turned on. Even though it will say that it isn't charging, it will charge very slowly this way as long as you're not using the Galaxy Note the whole time. So try that over night.

If none of those work, then you may have a bad battery in your Galaxy Note. How old is it? If it is still under warranty, you may be able to get it repaired for free.

Hi my Samsung galaxy tablet is flashing icon on and off signal but not charging? I have tried turning off for 30seconds still dead what should I do?

Sport mate, but it appears your device is communicating with you but you aren't decoding. *smiles*

First, you've got several problemchallenges all present in your device/tech gadget.

MTP- media transfer protocol...connected
USB connected.

To resolve, navigate your way to Settings/ developer options/USB debugging

Click on this and get the ? off, first.
Click again and get the ? back on.

Next, select from the displayed menu the option for USB charge only. EXIT.

Problem 1 solved.

Battery with red X marking on it while on display.
Battery is no longer considered GOOD? by your phone/tab.

Needs to be replaced.
Problem 2 solved.

Why Cellphone/tab not charging?
Check the recommended AC charger rating for your device/gadget, first.

Check the charger rating you've been using to see whether these values match.

Output DC=????
mAmps=????

Lastly, issue with Indpsert SIM card.
You need to confirm whether your cellphone/tab is locked to a particular Network carrier company or not.

If locked, you need to jailbreiak/unlock it.
Otherwise, a technician may have to check the SIM card terminals for you.

Hope these tips help. Feedback please. All the best.

I have the same problem charging from either wall socket or usb!!

Try the Reset button first - on the side...small hole. use paperclup with end extruded. Press in and hold down, turn unit on, release. If this does not work you will need to starve it of all power. no AC and remove the battery. Keep disconnected for at least two minutes. Reinsert the battery, fully charge, the turn on.

The Tab takes quite a long time to charge (not sure why). Note that the Tab cannot charge from a computer USB port (only from the included AC adapter. When the Tab has finished charging, it should put out a notification (open the notification drawer by pulling down on the status bar) saying the battery is fully charged and to unplug the charger. Other than that, you would have to install a third-party app like Smart Battery Monitor (see here) and watch that to see when it is full.
Hope this helps, Alistair