AG13 / LR44 / L1154 Battery Buy now for $.59 This battery is used in the following devices:Digital TDS PPM Meter Tester Drink Hydroponic Water Purity Monitor 0-9999 PPMRioRand® Pocket LCD Digital PH-009 0-14 Tester Meter Pen Aquarium Pool Water MeasureDatConShop(TM) Digital PH Meter + TDS Tester Aquarium Pool Hydroponic Water Monitor 0-9999 PPM People also search for the following batteries: