my laptop battery....help

Gateway_gtxxxxx

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so my battery is totally dead. the battery will not stay full charge or charge at all. so i decided to open the battery cassing and i find 12 14.8V 5700mAh Li-ion Battery

so my question is if i by these batteries and install them will it work again?
and how does this voltage thing work because i found this website http://www.all-battery.com/index.asp?PageAction=VIEWCATS&Category=174
and theres no 14.8V 5700mAh
is it like if i buy 3 sets of 4 batteries i multiple the 3.7v by 3 to find my total voltage?
i dont know help please
 
Need more information.

How many cells are in the original battery?

What is the voltage rating of each cell?

And the Amp rating of each cell?
 
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