We have this model for many years, the battery lasts a long time, about 2 years. After storms, some were due to increased electricity consumption - the battery was then regularly empty after 4 weeks - no longer usable. But really annoying is the yellowing of the cheap plastic after a few years, which no UV stabilizer was added (as in plastic or window switch panels). That would just a few (ten) cents cost, but the IQ is not enough or the marketing people have said: Let me see. Nervt total when the part is technically still top, but completely yellowed hanging from the ceiling in a bright room. Should get a vicious environment. Make changes.
