page_title: Alkaline battery
section_title: Capacity
hierarchical_section_title: Alkaline battery / Capacity
caption_attribution_description: English: I scanned them off in my scanner after buying them at my local shop. The sizes are written as a note at the bottom of the page and are stamped on the cells by the retailers/ manufacturers. The companies who made them are identified as near by headings and stamped on the cells like wise. They are all button cells, save for 4 9V batteries I added for a size comparison. It is now completed and cleaned up!-- --Wipsenade (talk) 17:45, 6 November 2010 (UTC) This work includes material that may be protected as a trademark in some jurisdictions. If you want to use it, you have to ensure that you have the legal right to do so and that you do not infringe any trademark rights. See our general disclaimer.This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
context_page_description: An alkaline battery is a type of primary battery which derives its energy from the reaction between zinc metal and manganese dioxide.
  Compared with zinc-carbon batteries of the Leclanché cell or zinc chloride types, alkaline batteries have a higher energy density and longer shelf life, yet provide the same voltage.
  The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide instead of the acidic ammonium chloride or zinc chloride electrolyte of the zinc-carbon batteries. Other battery systems also use alkaline electrolytes, but they use different active materials for the electrodes.
  Alkaline batteries account for 80% of manufactured batteries in the US and over 10 billion individual units produced worldwide. In Japan alkaline batteries account for 46% of all primary battery sales. In Switzerland alkaline batteries account for 68%, in the UK 60% and in the EU 47% of all battery sales including secondary types. Alkaline batteries contain zinc and manganese dioxide, which can be toxic in higher concentrations. However, compared to other battery types, the toxicity of alkaline batteries is moderate.
context_section_description: The capacity of an alkaline battery is greater than an equal size Leclanché cell or zinc chloride cell because the manganese dioxide is purer and denser, and less space is taken up by internal components such as electrodes. An alkaline cell can provide between three and five times the capacity of an acidic cell.
  The capacity of an alkaline battery is strongly dependent on the load. An AA-sized alkaline battery might have an effective capacity of 3000 mAh at low drain, but at a load of 1 ampere, which is common for digital cameras, the capacity could be as little as 700 mAh. The voltage of the battery declines steadily during use, so the total usable capacity depends on the cutoff voltage of the application. Unlike Leclanché cells, the alkaline cell delivers about as much capacity on intermittent or continuous light loads. On a heavy load, capacity is reduced on continuous discharge compared with intermittent discharge, but the reduction is less than for Leclanche cells.
caption: Several sizes of button and coin cells. Some are alkaline and others are silver oxide. Two 9 V batteries were added as a size comparison. Enlarge to see the size code markings.
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