Specs
 Type: High Capacity Lithium Thionyl Chloride (LiSOCl2)
 Voltage: 3.6 Volt
 Capacity: 16 Ah
 Cell Size: Double C
 Diameter
  Diameter: 26.2 mm
  Length: 98 mm

Replacement battery for:
 DigiTrak® SuperCell™
 Electrochem 26-99-150MR Series: 4339
 ER261020H
 MaxHDD
 HDD Power Cell

Passivation is a phenomenon that all lithium primary cells experience, for more information please see our paper on "Passivation in Lithium Batteries for HDD Sondes".

• What is Passivation:
• Occurs in all lithium primary cells due to interaction between lithium anode and electrolyte.
• A thin layer forms instantly on the anode surface when electrolyte is added.
• This layer protects the anode and conserves active materials during storage, extending shelf life.
• Effects of Passivation:
• Normally does not degrade performance.
• If the layer becomes too thick (e.g., due to long storage or high temperature), it can impair discharge performance.
• Thick passivation can cause voltage delay—a lag between applying a load and voltage response.
• May show as a low battery reading or unacceptable voltage on a Transmitter Information Screen.
• Battery Behavior:
• Once installed and discharging, battery voltage typically rises to normal levels.
• Discharge helps break down the passivation layer, increasing porosity and power output.
• One Source Batteries (OSB) Specific Practices:
• Double C cells are De-Passivated every 6 months and tested before shipping.
• Recommended to install or maintain within 4 to 6 months after purchase.
• Installing after this window may show low voltage due to passivation.
• Passivation can be reversed by Depassivating the cell again.
• Installation Insight:
• Once a battery with acceptable voltage is installed, it starts discharging.
• When your Double C cell is installed the battery begins discharging and the lithium ions migrate through the battery, breaking down the passivation layer.
• This leads to full battery utilization and proper operation.

Notes
  Battery life differs according to the transmitter being used, the materials and depths it is being used in.
  A deeper depth transmitter will use more power than lower depth transmitters.
  These batteries are designed to fit most all DigiTrak® transmitters and DitchWitch beacons.

DISCLAIMER

• This unit is designed for the Double C cells sold by One Source Batteries.
• It is sold only to customers who currently purchase Double C cells.
• Customers must have an online account established.
• To purchase this testing fixture, follow this link.

Introducing One Source Batteries Double-C Battery EOL Test Fixture

The Double-C EOL test fixture is a tool that will allow you to test batteries before they are installed in your DCI, Ditch Witch, Subsite or any other beacons using the Double C lithium batteries.

For more information on this test fixture for the One Source Batteries Double C cells, call us at (888) 321-9264 or email Support@OneSourceBatteries.com.

To purchase this test fixture use this link to see the terms of purchase.