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This is a guide to replace the battery in the Fitbit Alta HR fitness tracker.
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Push in the clip and slide off the strap from each side.
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Use a spudger to remove the front cover.
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Use a spudger to lift the display.
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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 hex 0.7 screwdriver to remove the screws from the motherboard.
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Use a spudger to lift 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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Use a soldering iron to desolder the two battery contacts from the motherboard.
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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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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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