Einleitung
This is a guide to replace the battery in the Fitbit Alta HR fitness tracker.
Werkzeuge
Ersatzteile
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            Use a spudger to disconnect the cable that connects the heart rate monitor to the motherboard. 
 
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            Use a spudger to lift the battery. 
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            When the battery is lifted, the connected components (display, motherboard, battery) will come out. 
 
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            Ensure positive and negative wires are in the correct positions. There are + and – signs on the motherboard. Red is positive. Black is negative. 
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            Use a soldering iron and lead-free solder to solder the new battery to the motherboard. 
 
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                            Abschluss
                          
                          To reassemble your device, follow these instructions in reverse order.
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