![]() Note: CR/BR (Lithium) battery types are 3.0 Volts. This mistake in the handbook appears across several different models of Casio solar calculators. The handbook is wrong! The replacement for the National GR927 is the 399 silver oxide battery and not If you are replacing a National GR927 battery in a Casio calculator please note that your calculator handbook is likely to say that Watch battery suffixes read our All About Watch Batteries write up. You shouldĬheck that your application will not be affected by the slight increase in battery voltage which will result in using a silver oxide watch batteryįor further information about watch batteries their chemistry, numbering, watch battery prefixes and Mercury watch batteries are no longer manufactured so your only alternative is to use a silver oxide watch battery of the same size. Made of brands such as Maxell, Renata, and Toshiba. The battery numbers in blue text are links to more information on the particular battery and will take you to a page where you will be able to order the battery. LR44 batteries and LR44 battery equivalent are an Alkaline Zinc Manganese select cell battery.LR44 Batteries were 1.5 Per. Watches frequently employ these silver oxide batteries (that explains the W in the label). The SR44 battery/SR44 battery equivalent is an alkaline battery, and equivalent batteries include the L1154, 154, G13, LR1154, A76, AG13, and others. ![]() Yet, this difference is so less to count. On the contrary, SR44 batteries, which use Silver-oxide, have 1.55 voltage. For example, LR44 batteries, which use Alkaline, have 1.5 V as nominal voltage. This difference makes a slight dissimilation between them. Watch battery, even if the sizes are comparable. The Cell Batteries Cross Reference Chart. As I said before, SR44 and LR44 use different chemical mechanisms. Note, that the lithium watch batteries, or button cells, are 3 volts, not 1.5 volts and cannot be substituted for a 1.5 volt silver oxide watch battery or alkaline This will give you an idea of which watch battery to choose if you do not have a watch battery cross reference number to match the battery against. The Watch Battery Cross Reference table can be sorted by watch battery size, either by selecting the watch battery diameter, or the watch battery thickness Numbers as used by various different watch battery manufacturers. The Watch Battery Cross Reference Table below gives all Watch Battery sizes and their equivalent replacement watch battery reference
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