Batteries for pH/TDS pen or Thirsty Light (pack of 4 batteries)
Batteries for pH/TDS pen or Thirsty Light (pack of 4 batteries) at HorticultureSource.com -
Hydrofarm Batteries for pH/TDS pen or Thirsty Light (pack of 4 batteries) (HGPROBAT) Stock up on batteries for your pH/TDS pen and never be without. The tiny battery discs hardly take up any room-- you can even store them right in your pen case so you're always prepared.  Also work as replacement batteries for your Thirsty Light. Manufacturer's Product Information MSRP each $ 6.95 UPC 638104002608 Dimensions 5.51 x 0.48 x 8.46 Case Quantity 6