Introduction
Follow this guide if you need assistance to replace your Panasonic Lumix DMC-ZS40 battery. The battery may need to be replaced if your camera is consistently dying before its full lifespan is used up, or if it doesn't turn on at all.
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            Find the battery/memory card door on the bottom right of the camera. 
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            Use your finger or screw driver to slide the grey latch from the locked position to the open position. This will swing open the door. 
 
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                            Conclusion
                          
                          Follow these instructions in reverse order to replace the battery and reassemble.