# IBS-TH1 Plus vs IBS-TH2 Plus **URL:** \ **Category:** Questions & Answers\ **Tags:** smart-sensors\ **Created:** [February 1, 2025, 10:40pm UTC](https://community.inkbird.com/t/ibs-th1-plus-vs-ibs-th2-plus/166431 "2025-02-01T22:40:41Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![sdcinvan](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/sdcinvan/32/251_2.png) [@sdcinvan](https://community.inkbird.com/u/sdcinvan)\ **Post date:** [June 30, 2026, 11:08pm UTC](https://community.inkbird.com/t/ibs-th1-plus-vs-ibs-th2-plus/166431/5 "2026-06-30T23:08:34Z")
The IBS-TH2 Plus sensors appear to suffer from extreme battery drain. But the IBS-TH1 Plus… I have several that have been running perfectly for about 3-4 years. I only need to change the batteries about once per year. See: > [@IBS-TH2 - draining batteries in just a few days](https://community.inkbird.com/t/ibs-th2-draining-batteries-in-just-a-few-days/166254/26): > > I had no issues with any of my Inkbird sensors from approximately 2020 until my most recent purchases, starting in April of this year. What seems unusual is that the extreme battery drain issue appears to affect only the newer IBS-TH2 Plus sensors with the temperature-only external probe purchased between April and now. These units are all running the latest firmware, version 2.7.0, yet they are draining fresh AAA batteries in only a few weeks. By comparison, the IBS-TH2 Plus sensors with the … > [@IBS TH2 plus battery problem](https://community.inkbird.com/t/ibs-th2-plus-battery-problem/15829/2): > > Hello, May I know what the ambient temperature is for placing the IBS-TH2 PLUS? Will it also drain within 1 week if tested with fresh alkaline batteries? --- _[View the full topic](https://community.inkbird.com/t/ibs-th1-plus-vs-ibs-th2-plus/166431)._