Help: Shutdowns Galaxy tab!!

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Hello

I think my Galaxy tab battery calibrated is messy! because When I charge the Galaxy tab below the 40%, off automatically! When I turn it on, off again after the Samsung logo. But when I charged the device does not have this problem. Of course, sometimes over 40% of the battery, this happens!
(also I've done the battery wipes, but no avail.)

How is the problem?

Who can help me?

There is a thread about opening up the tab and disconnect the battery for a while and connecting it back.

Sent from my GT-P1000 using XDA

I tried this but had no effect!!

GT-P1000 suddenly switching off when battery is not empty (40% in my case). Must be some sort of hardware battery controller problem. Had this issue until yesterday. Openned the tab and disconnected battery as per youtube video. Connected it back after several minutes. Now problem is gone and tab is running perfectly.