Smoke alarm alarm

[Fred]

I havent seen it before, but its my only device that uses those batteries and I replace that battery very rarely, only after a few years.

[Bert Coules]

Well, quite. But I could imagine some users being tricked into thinking that Duracells have some unique property and that any other (especially cheaper) make might not function correctly - and for a safety device that could be worrying.

[Jimmy Stewart]

and their no leak guarantee is not worth the paper it might be written on.....

[Dave Plowman (News]

Most instructions for this sort of thing contain reams and reams of totally irrelevant information. To please the lawyers. To the point where few read them carefully.