Introduction
If your remote doesn’t work the first thing you should check is the battery; being a very simple device it's very likely that the battery has died. For the replacement all you are going to need is Phillips #1 Screwdriver and a new CR2032L coin cell battery. The battery should last you upwards of 10 years with normal use so don't expect to be back in this guide anytime soon.
Tools
Parts
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The battery should come out with mild pressure applied to the bottom.
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Insert a new CR2032L coin cell battery.
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Conclusion
To reassemble your device, follow these instructions in reverse order.