I have these:

https://zigbee.blakadder.com/Tuya_WSD500A.html

...use 2xaaa batteries. Accurate and reliable, got a bunch around the place.

You can buy rechargable coin batteries.

If the screen isn't important, Third Reality makes a slightly cheaper version with no screen that also takes AAA - conveniently on sale now

https://camelcamelcamel.com/product/B0D2NVJTS3

I have a mix of those and an old version of these Govee Bluetooth sensors that are also fully offline, take AA batteries, and pair well with HA

https://camelcamelcamel.com/product/B07Y36FWTT

Not strictly ZigBee, but cheaper, just as accurate as the 3R, and fully offline

I have one of the 3rd reality ones and it's been good, only had it get stuck one time in a year and I think it was just a low battery thing. It indeed does use a AAA battery, but the sensor is expensive for what it is unfortunately.

@ueiqkkwhuwjw Be looking on #aliexpress much cheaper and basically the same thing without the retailer markup

would this be of use?

https://shellystore.co.uk/product/shelly-ht-gen3-matte-black/

@ueiqkkwhuwjw I have had a few - Nice to have the display - good battery life (I use rechargable AAA from IKEA) - My HA / MQTT system hasn't been runnnig properly as I'm trying to get #Zigbee2MQTT running inside #yunohost - and life has been a series of disruptions.

I got these: https://www.pearl.de/a-ZX7311-3110.shtml;jsessionid=nAF84CDBD95715305C44924424332C488?vid=953&curr=DEM

Not sure how precise they really are but they connected easily. Have them running for 34 months now, they run for months on rechargable AAA (I got high quality ones, Varta I think)

Hi, If the one you link is good enough for you in term of accuracy, you can pick nearly everything you find at Aliexpress. Since you will be using rechargeable batteries, might be best to pick one without screen.

If you are OK exploring espHome then have a look at "Apollo Automation" devices. https://apolloautomation.com/products/temp-1

I have a few of these: https://www.zigbee2mqtt.io/devices/TH02Z.html#tuya-th02z

They're fine with rechargeable aaa batteries.

I put one outside, slightly under the roof, and after about a year it got damaged somehow. It's showing significantly off temperature and humidity, even after being inside for months after that.

So maybe not good for outside weather.

I like the sonoff sensors

I think the options either that combination are limited. IKEA Zigbee devices use removable batteries, but they don’t have a temperature sensor. They do have a USB air quality sensor but it’s a bit more complex/expensive.

There are some good WiFi, Bluetooth or RF options with removable batteries but they won’t be Zigbee.

I’ve heard of some people modifying the coin cell devices to used a wired power supply, maybe that would be an option.

Wifi instead of z whatever

https://www.shelly.com/products/shelly-h-t-gen3-matte-black

Shelly's integration works well, and mqtt is available. I use the. Plugged in and the update rate is awesome.