3 Chemistry of the Button Cell Half EquationsCathode reactionAg2O (s) + H2O (l) + 2e- → 2Ag (s) + 2OH-Anode ReactionZn (s) + 2OH- → ZnO (s) + H2O + 2e-Full EquationZn (s) + Ag2O (s) → 2Ag (s) + ZnO (s)
4 Cost and Practicality Silver is an expensive metal The production of the cell is therefore expensiveNon rechargeableSmall and lightHas a relatively long life span
5 Impact on SocietyDue to its small size it has allowed the production of small electrical appliancesDue to its non toxic nature it has allowed for it to be used inside the body
6 Environmental Impacts Due to its unrechargeable nature, it has to be discarded or recycled after only one usePotassium hydroxide that is found within the cell is caustic (causing corrosion)No highly toxic materials that will harm the environment
9 Cost and Practicality Very cheap Form of paste it is very convenient , being very transportable.Small and easy to store and useMaintains a steady voltage, therefore they are good for a range of electronic such as torches, walkman and toys.Cannot be rechargedShort lifeCannot deliver a high currentBattery may leak
10 Impact on SocietyDue to its low constant voltage it is used for common appliances such as torches, toys and portable radios/cdsDue to its mobility , portable items like flashlights could be used , therefore increasing the development of electrial equipments/ devices.The popularity of batteries have increased
11 Environmental ImpactSmall amounts of zinc are not problematic, however large amounts of zinc is a threat.Manganese is also a heavy metal, dispose in large quantities are not beneficial for the environment.