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Message: <blockquote data-quote="BruceH" data-source="post: 3489692" data-attributes="member: 106398">I wonder why Canon does not recommend the AA throw away lithium batteries.  My initial thought was a voltage difference but I seemed to remember that the lithium in question has the same nominal voltage as AA alkaline batteries.  So, I looked up the specs for both in the Energizer brand and both are nominal 1.5 volts and the sizes look to be the same.  AA Energizer Alkaline - Nominal 1.5 Volts<a href="http://data.energizer.com/PDFs/E91.pdf" target="_blank">http://data.energizer.com/PDFs/E91.pdf</a> AA Energizer Lithium  - Nominal 1.5 Volts<a href="http://data.energizer.com/PDFs/l91.pdf" target="_blank">http://data.energizer.com/PDFs/l91.pdf</a>There is a difference between the above and nickel–metal hydride (NiMH) batteries in that the NiMH batteries have a lower nominal voltage of 1.2 volts.  They seem to work fine because the voltage of standard batteries drop rather rapidly compared to NiMH Eneloop batteries that maintain voltage.  Scroll down to the second Q&A for a discharge graph comparison of the rechargeable Eneloop AA NiMH.  <a href="https://www.panasonic.com/global/consumer/battery/eneloop/technologies.html" target="_blank">https://www.panasonic.com/global/consumer/battery/eneloop/technologies.html</a>It would be great if someone could offer an explanation of why the AA alkaline battery is acceptable but the same nominal voltage lithium is not.  The only thing that comes to mind is the lithium holds a higher voltage longer under a load.</blockquote>

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