E-Block is the name in some countries for what we used to call a PP3. The reason they specify alkaline is the long shelf life. Zinc Carbon (or in reality these days Zinc Chloride) batteries are still depressingly common. In the heat of a mains powered smoke alarm (they do generate a little, enough to cause the temp to be a fair way above ambient inside the casing), can cause those to leak in short order.
It's basically being nice to the consumer, 'don't destroy the thing that might save your life by buying an asda smart price zinc battery'
Trade price for the 'right kind of battery that you show the box of there is about a pound a unit inc vat round here, hardly a lot for a year's protection :)
And re: radio, with me it was 648 medium wave under the covers, always liked the BBC World Service
E-Block is the name in some countries for what we used to call a PP3. The reason they specify alkaline is the long shelf life. Zinc Carbon (or in reality these days Zinc Chloride) batteries are still depressingly common. In the heat of a mains powered smoke alarm (they do generate a little, enough to cause the temp to be a fair way above ambient inside the casing), can cause those to leak in short order.
It's basically being nice to the consumer, 'don't destroy the thing that might save your life by buying an asda smart price zinc battery'
Trade price for the 'right kind of battery that you show the box of there is about a pound a unit inc vat round here, hardly a lot for a year's protection :)
And re: radio, with me it was 648 medium wave under the covers, always liked the BBC World Service
