Introduction
Tools
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            Insert a plastic opening tool into a gap near the charging port at the top of the device. Slide the tool in either direction along the device. 
 
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            Slide the tool along until you have completely separated the rear cover. 
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            If needed, place the first tool in the gap created to hold this gap open and use a second tool to pry the remaining portion of the rear cover off. 
 
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            Once all the sides have been separated, you should be able to simply lift the cover off of the device. 
 
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            Use the plastic opening tool to lift the battery off of the back panel. The adhesive used is strong so apply force during removal. 
 
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            Lift the battery off of the panel gently. This will disconnect the battery connector from the motherboard. 
 
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To reassemble your device, follow these instructions in reverse order.
2 comments
Why the battery has a 4 pin connector? I tried to buy another generic battery but it got only 2 cables, don't know how to replace :(
Tadeu -
I just wanted to throw a red flag out there…I broke my connector off the motherboard trying to reinstall the four-pin connection…can anyone advise?