I am looking for a decent cheap optical smoke alarm that doesn't require going into the mains.
I tried looking at my local tesco homeplus today if the optical smoke alarm for 56p was still there but it seems to be only part of packs now and had limited selection on shelf. The best was an angelfire optical 10year one for £10 which isn't bad but I would prefer £5 max
Obviously as it is a fire alarm I do want a proper one that performs to safety standards which is the reason why I am not going to go down the auction route.
Has to be optical though not ionising one.
Also does anyone know a site that shows different floor plans for best placement? I wouldn't mind knowing knowing where to properly place it if I am going to do it at all.
It wouldn't be in UK this alarm is for so no point trying to get the fire brigade to help.