Batteries for PRO pH/TDS pen or Thirsty Light, 1.4V (pack of 4 batteries)
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.
4.0L x 2.5W x 0.2H