These batteries used in Digitrak  Horizontal  Locators and Ditch Witch  beacons

Drilling transmitters use two alkaline "C" cells. Because non-rechargeable lithium batteries have over twice the voltage of alkalines we created a "Double C", a single cell twice as long as an alkaline C cell with 3.6 volts. This battery replaces two C cells in series.

Those Double-C is the only Chinese Double-C cell to have passed UN Transportation testing UN38.3. See the certificate below.
These Double-C battery has been redesigned to perform even better in harsh environments. This improved cell is exclusive to PowerStream. Visbis is the Powerstream branch in Europe.

    The production was moved to a new state-of-the-art production line with demonstrated ability to produce cells with tighter tolerances, higher capacity, and lower internal resistance.
    We have updated the chemistry to almost completely eliminate passivation effects, which show up as voltage sag during start-up. This also improves the performance under cold weather conditions
    We have improved the design to be more tolerant of shock and vibration. We have found in the past that vibration damage is the biggest reason that cells sometimes have short service life.
    We have instituted 100% vibration testing.

• From 2.2 to 6 times the capacity of two alkaline C cells in series
• Compatible with Digitrak ® Mark Eclipse®, LT ™, SE ™, F2 ™, Spot ®, and D Tek transmitters and Ditch Witch beacons.
• Much better voltage hold-up during discharge than alkalines or power sticks
• Extremely long shelf life--up to 20 years
• Single welded steel shell, cannot leak. A single cell is more reliable than two cells welded together.
• We have sold thousands of cells over 8 years for horizontal drilling sondes and have many happy repeat customers, including some of the biggest names in the directional drilling business.
• These cells use the same lithium thionyl technology that the military uses for night vision.