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Replacement button battery batteries for Pen style Tester Meter, SALT-3000, SALT-3050, TDS-EZ, ZT-2, TDS-3, TDS-4, COM-80, PH-80 and many more. $3.99 |  Milwaukee Mi0005 / HANNA HI 740029P 9V Battery
Maxell 6LF22 Gold Battery 9V Alkaline |