Batteries

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The advantage of many Zigbee sensors is that they work completely wirelessly. You can place them everywhere without wiring. Most of the devices run for years on a single battery, but every now and then you need to replace them. Before you start using a new sensor, check which battery it uses and order a few in advance. When it runs out of power, you can replace it immediately with a new battery.

These are common types of batteries used by the above-mentioned sensors:

Battery eliminators

A battery eliminator (aka battery replacement) is, as the name suggests, a replacement for battery-powered devices to connect them to mains power. This saves you from buying new batteries. The big advantage is also that you can now control them with your home automations by adding a smart plug between the device and the wall outlet. You also don’t have to worry about forgetting to turn them off again. There are different variants, including replacements for AA or AAA batteries and versions with a plug or USB connector. The advantage of a USB connector is that you can plug several into a powered USB hub to control multiple devices.

I use these a lot for all kinds of Christmas decorations.