you can't have a citation that something does not exist unless that citation contains proof that the construction is impossible that the citation author is unaware of the existence of something is not proof that it does not exist i am unaware of the existence of cylindrical celled zinc carbon batteries but i would never make the claim that they don't exist in this case the author of your reference is wrong the centre battery in the illustration to the right is of a flat celled alkaline battery zinc carbon and indeed zinc chloride batteries are made using layer cells wrapped in a wax type coating or even these days heat shrink plastic for that is all that is required alkaline cells generate gas during discharge which is absorbed by the chemistry though there is a delay as a result some pressure does build up which requires a more substantial container in virtually all alkaline constructions that container is made from steel even a quick look at the centre battery shows rectangular cells made with steel containers no manufacturer of zinc carbon batteries is going to go to that unnecessary expense i have therefore reverted your edit if you wish to continue to insist that there are no rectangular celled alkaline batteries then please provide a citation that the construction is impossible leclanch cells to describe dry celled zinc carbon as 'leclanch ' is completely incorrect georges leclanch did not invent build or even conceive of a dry version of his famous cell indeed the chemistry isn't even the same the electrolyte in the leclanch cell is ammonium chloride the paste electrolyte in the dry zinc carbon battery is a mix of ammonium chloride and zinc chloride the difference gives the dry battery an e m f of a little over volts versus the leclanch volts later so called high power versions of the cell dispensed with the ammonium chloride completely and just used zinc chloride in any case the most common name for this type of cell is the zinc carbon and that should therefore be what it is refered to in the article few people if anyone at all call it anything other than a zinc carbon i also cannot find any manufacturer who describes it as 'leclanch ' i have therefore reverted this as well