Battery operated programmable stats are often criticized because the batteries need changing frequently, or so it is alleged.
I went to my Honeywell CM927 just now and the low battery sign was flashing. So I got a fresh pair of Duracell Ultrapower Duralock and started to change the batteries.
Off came the cover and out with the old (Duracell Plus). Behind the batteries was a slip of paper with 22-10-10 written on it - the date I had last changed the batteries - nearly three years and five months ago!
The old batteries measure about 900mV.
I went to my Honeywell CM927 just now and the low battery sign was flashing. So I got a fresh pair of Duracell Ultrapower Duralock and started to change the batteries.
Off came the cover and out with the old (Duracell Plus). Behind the batteries was a slip of paper with 22-10-10 written on it - the date I had last changed the batteries - nearly three years and five months ago!
The old batteries measure about 900mV.