Quick view Pyxis Wireless pH/ORP Module Replacement Battery Size ER14250 3.6V MSRP: $18.00 1 to 2 week lead time as we do not stock common batteries. These can be found locally in the battery section of most retail stores like Walgreens, Rite Aid, Wall Mart or Batteries Plus. A 3.6V 1/2AA Lithium Battery for... MSRP: $18.00 Add to Cart The item has been added Add to Wish list Compare