Before you replace the battery, you must remove all dirt, water, and debris from the device. You also need a small Phillips screwdriver and the security screwdriver included with the battery replacement kit.
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Remove the eight security screws from the back of the device.
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Lift up the back plate.
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Grip the battery connector wires close to the connector, and pull the connector perpendicular to the circuit board to disconnect the battery connector from the device.
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Grip the rotary switch connector wires close to the connector, and pull the connector perpendicular to the circuit board to disconnect the rotary switch connector from the device.
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Remove the two screws from the battery plate.
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Lift up the battery plate.
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Remove the old battery from the back plate, noting the orientation of the battery.
The battery fits tightly. It may be necessary to pry the battery out of the back plate using a non-sharp, non-metal object.
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Install the new battery into the back plate with the label side up, using the same orientation as the old battery.
The battery orientation is noted graphically inside the back plate.
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Replace the battery plate to its original position.
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Replace and tighten the battery plate screws.
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With the new battery, connect the battery connector to the device.
When properly installed, the connector plug snaps into the port.
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Reconnect the rotary switch connector to the device.
When properly installed, the connector plug snaps into the port.
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Verify the gasket is not damaged and is completely seated in the groove on the front half of the device.
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While ensuring the battery and rotary switch wires are not pinched, hold the back plate and the device firmly together, and replace all eight security screws without tightening.
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Verify the back plate and the device are aligned with no gaps.
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Tighten the screws evenly.
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Verify the gasket is not sticking out of the device.
Fully charge the device before use.
If necessary, calibrate the compass (Calibrating the Compass on the Handheld Device).