<\/span><\/h2>\nMany Zigbee sensors have problems retrieving battery information. I would like to know if the TH03 gives real information.<\/p>\n
I see that the ZTH05 gives me the information on the screen:<\/p>\n
![\"\"](\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2026\/06\/petitepile.jpg\")
<\/p>\n
![\"\"](\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2026\/06\/Capture-decran-2026-06-13-183004.png\")
<\/p>\n
![\"\"](\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2026\/06\/Capture-decran-2026-06-13-183010.png\")
<\/p>\n
So I'm going to reverse the batteries of both \u2026 equipment.<\/p>\n
ZTH05 detects battery change to 100% \/ 3100mV, it works perfectly<\/p>\n
TH03 doesn't move, it stays at 100% \/ 3000 mV, we will wait 24h \u2026 sometimes, we have to wait for it to go back up.<\/p>\n
Finally, 20 minutes later, the battery indicates: 65% \/ 2600mV, it has nothing to do with the value of the ZTH05 but already, it is moving, it is a good sign, an info goes up.<\/p>\n
And the next morning \u2026<\/p>\n
![\"\"](\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2026\/06\/Capture-decran-2026-06-14-094746.png\")
<\/p>\n
![\"\"](\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2026\/06\/Capture-decran-2026-06-14-094756.png\")
<\/p>\n
So it is absolutely perfect! The battery measurement is the same as on the ZTH05, so one could consider that connected battery, this is fair. The percentage has to be a calculation, it's different, but it doesn't matter.<\/p>\n
I note that the TH03 does not have a small almost empty battery logo lit at 27%, time will tell if this logo is missing or if it only reaches 25% or 20%\u2026<\/p>\n
But I am amazed for this type of product that the battery replacement works as well, on equipment of reputable brands, we still have problems of battery recovery regularly in Zigbee.<\/p>\n
<\/p>\n
\ud83d\udcc5 Installation and monitoring of batteries<\/span><\/p>\n\n- Installed on 13\/06\/2026<\/strong> (test piece)<\/li>\n<\/ul>\n
As this model works on battery, I always keep an eye on the battery level and the voltage raised. This is often more useful than the simple percentage, especially on small economic sensors.<\/p>\n
<\/span>\ud83d\udd0d What communities say<\/span><\/h2>\nProblems:<\/strong> I went through community forums, little feedback. This is a good sign, some accuracy messages may vary slightly depending on the location, the battery used and the frequency of data retrieval.<\/p>\nWe must therefore avoid comparing it to a high-end weather station.<\/p>\n
My tips:<\/strong> I allow the sensor to stabilise a few hours after installation, compare with another known probe, then apply a temperature or humidity calibration in Zigbee2MQTT if necessary.<\/p>\n<\/span>\ud83d\udcac My opinion after commissioning<\/span><\/h2>\n\u2705 Forts:<\/strong> very low price, readable screen, simple Zigbee2MQTT integration, temperature and humidity measurements, battery and voltage tracking, compact format.<\/p>\n\u274c Weak:<\/strong> very basic finish, precision to be checked according to use, sensor especially designed for simple ambient monitoring, not for a reference measurement.<\/p>\n <\/p>\n
My verdict:<\/strong> for 5 \u20ac, I find this TH03 frankly interesting.<\/p>\nI would gladly use it to equip several rooms in the house on a low budget, especially if I want to multiply the measuring points without exploding the total cost of my installation.<\/p>","protected":false},"excerpt":{"rendered":"
I am particularly curious, I come across a ZIGBEE thermometer + humidity sensor for less than \u20ac5 with a screen that focuses on the essentials. I saw him pass by, is he up to the task? To put in all the rooms, at this price, it is a great opportunity.<\/p>","protected":false},"author":1,"featured_media":11595,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[14,53,108,68],"tags":[],"class_list":["post-11587","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-domotique","category-home-assistant","category-test-produit","category-zigbee-materiels"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/posts\/11587","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/comments?post=11587"}],"version-history":[{"count":0,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/posts\/11587\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/media\/11595"}],"wp:attachment":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/media?parent=11587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/categories?post=11587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/tags?post=11587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}