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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Posted to sci.electronics.components,sci.electronics.repair,alt.engineering.electrical
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Real difference between LR44 and SR44 button cells? Info please
I bought a card full of approx forty assorted LR button cells marked
"silver oxide" for a pound (not even two US dollars). I didn't expect much but to my sheer total astonishment they seemed to work quite well! So far. Then I got to thinking that maybe they will leak horribly when exhausted. So I figured I should see what the designation "LR" means. As you can see below, I am not much wiser! Can someone offer some real facts on the difference between LR and SR button cells. --------------- I have found lots of contradictory info on the web about the difference between LR44 and SR44 button cells. Or just LR and SR cells. (1) Some say that the LR44 is ALKALINE, others say it is SILVER OXIDE. Some same it is both! (2) Another says LR44 and SR44 are designations used by DIFFERENT MANUFACTURERS. For example: http://www.tic-toc.co.uk/chart.htm (3) Some say that a silver oxide cell has greater CAPACITY than the equivalent alkaline. http://www.sr44.com/ (4) Others say that the silver oxide SELF-DISCHARGES quickly other say slowly. http://members.iinet.net.au/~fotoplot/accbatcc.htm (5) Some refer to RATE OF DRAIN and say the silver oxide can take a heavy load. Others say the alkaline can deliver more. (6) One says that some SR44s are EQUIVALENT to type 357 but that some different SR44s are equivalent to type 303. Weird. See http://snipurl.com/lmcf (7) Most seem to say that the silver oxides deliver a constant voltage until they pack up whereas the alkalines deliver a declining voltage. All that truly confuses me now. Oh dear! What of the above is true? ------------------- |