These come in at about an eye watering £40 each and last less than a year.
I replaced it with 5 1.5V alkaline cells which are considerably cheaper but seem to last about the same time. There is still a considerable charge in the cells - 4A into a S/C.
My questions are :-
1) Why don't they last ? Does it draw current all the time, or only during ignition or while the fire is on? Is there a minimum voltage ?
The site says
"it depends on how often the unit is operated and how often it is left on."
2) Is there something better ?