This is a pair of Energizer CR1220 batteries. This item is brand new and guaranteed to be factory fresh. These batteries are frequently required for prominent brands including Swatch, Fossil, Timex, and Casio. this is a lithium battery. The handbook is wrong! The replacement for the National GR927 is the 399 silver oxide battery and not

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Before you buy something, consider why you want it. If you’re purchasing something to use once and then toss away, there are cheaper alternatives that will accomplish the same thing as this product but better; or if you’re buying something to last a long time, it’s worth investing a little more to ensure top-notch quality! Cost The reported failure rate for Energizer is less than 1/1000 of 1%. Because of its commitment to constant quality, it now has a market share of more than 70% in Switzerland, one of the world’s leading watchmaking countries.They’re the same thing. I’m not sure why it says “low drain,” because that term is normally used for Silver oxide cells, and it refers to the battery’s ability to tolerate high or low drain applications, not how long it will survive. Mercury watch batteries are no longer manufactured so your only alternative is to use a silver oxide watch battery of the same size. You should Murata, based in Japan, launched silver-oxide and alkaline batteries in 1978, lithium batteries in 2008, and novel button cell technologies in 2009.

Energizer CR1220 Lithium Coin Battery | Halfords UK

the CR927 3V lithium battery. This mistake in the handbook appears across several different models of Casio solar calculators. I’m not sure what official implies when it comes to a Cr1220 3v Lithium Battery. I’ve successfully utilized this kind in a number of applications. Pros

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