1 X Renata 379 Mercury Free 1.55 Volt Watch Battery Replaces SR521SW

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or height). 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.

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 Button/coin cell batteries are a group of non-rechargeable batteries. Wristwatches are commonly powered using one or rarely two-button/coin cell batteries, and these batteries have limited operating lifetime. The Watch Battery Cross Reference Table below gives all Watch Battery sizes and their equivalent replacement watch battery reference This lithium battery conversion chart converts cells for Everready, Energizer, Duracell, Maxell, Panasonic, and Varta. They are all 3.0 voltage, and converts these battery cell numbers: CR1025, ECR1216, CR1216, ECR1220, DL1220, CR1220, ECR1225, ECR1616, CR1616, ECR1620, DL1620, CR1620, ECR2012, CR2012, ECR2016, DL2016, CR2016, ECR2025, DL2025, CR2025, ECR2032, DL2032, CR2032, ECR2320, CR2320, ECR2430, DL2430, and CR2430. Just take it to a jeweler and let them change it for you. They have all the tools, and it’ll only take them a couple of minutes.Lithiums are commonly used for calculators, remote control car starters and of course watches. Watches that use lithium batteries are normally the ones that have lots of functions and dials and buttons on them. Functions that use up a lot of juice.

For further information about watch batteries; their chemistry, numbering, watch battery prefixes and this is a lithium battery. The handbook is wrong! The replacement for the National GR927 is the 399 silver oxide battery and not This chart converts batteries and voltage (most are 1.5 or 1.35 Volts) for Everready, Energizer, Duracell, Maxell, Panasonic, and Varta. And converts battery cell numbers: 301, D301, SR43SW, SP301, V301, 303, D303, SR44SW, SP303, V303, 309, D309, SR754SW, WS6, V309, 313, D313, NP313, V313, 314, SR716W, 315, D315, SR716SW, V315, 317, D317, SR516SW, SP317, V317, 319, D319, SR527SW, SP319, V319, 321, D321, SR616SW, SP321, V321, 323, D323, WH-6, V323, 325, D325, WH-1, V325, 328<, 329, D329, SR731SW, V329, 333, SR610SW, 335, SR512SW, SP335, 337, SR416SW, SR416SW, 339, SR614SW, V339, 341, V341, 343, D343, NP343, V343, 344, D344, SR1136SW, WS12, V344, 350, D350, V350, 354, D354, V354, 357, D357, SR44W, SP357, V357, 361, D361, SR721W, SP361, V361, 362, D362, SR721SW, SP362, V362, 364, D364, SR621W, SP364, V364, 362, D362, SR721SW, SP362, V362, 365, SR1116W, 366, D366, SR1116SW, V366, 370, D370, SR920W, SP370, V370, 371, D371, SR920SW, SP371, V371, 372, SR916W, SP372, 373, D373, SR916SW, SP373, V373, 376, SR626W, SP376, 377, D377, SR626SW, SP377, V377, 379, D379, SR521SW, SP379, V379, 381, D381, SR1120SW, V381, 384, D384, SR41SW, SP384, V384, 386, D386, SR43W, SP386, V386, 387, D387, V387, 388, D388, V388, 389, D389, SR1130W, SP389, V389, 390, D390, SR1130SW, WS-10, V390, 391, D391, SR1120W, SP391, V391, 392, D392, SR41W, SP392, V392, 393, D393, SR754W, SP393, V393, 394, D394, SR936SW, V394, 395, D395, SR927SW, SP395, V395, 396, D396, SR726W, SP396, V396, 397, D397, SR726SW, SP397, V397, 399, D399, SR927W, SP399, and V399. All batteries listed are battery chemical system “ silver-oxide” except for these few batteries listed: 313, 323, 325, 343, 354, 387, and 388. Those batteries are actually mercury batteries.

If you are replacing a National GR927 battery in a Casio calculator please note that your calculator handbook is likely to say that Make sure you get the proper battery for your watch. If not, have a jeweler do it for you. I always advise that anyway. People have a tendency of breaking their watch if they don’t know what they’re doing (crystals, crowns, gaskets, bands). It’s not worth the trouble. CR1025 is made by Panasonic and goes by a couple of different names: BR1025, P031 ND, and P031 and has no conversion that I know of.