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The Samsung GT-C3300K is a budget touchscreen phone released June 2010.

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My phone says "fully charged, diconnect charger" when it isn't.

It happens to me very often. My battery is almost completely emty & I connect the charger. After several minutes it says "fully charged, diconnect charger", but afterwards it beeps again that the battery is low.

Anything to do about it?

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Hi,

Your battery may be failing.

How old is the battery? Even rechargeable batteries have a life span.

Here is a link to some suppliers of the battery. It is not a recommendation to use them it is shown to give an indication of the price. They are not that expensive.

Update (03/23/2017)

Hi,

You could always try calibrating the battery and see if this resolves the problem for you.

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I've tried changing batteries but it didn't help.

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