SportDog SBC-R Bark Collar Compatible Battery 3.7V 160mAh

SportDog SBC-R Bark Collar — 3.7V Li-Polymer Replacement Battery (SAC54-16091)

This 3.7V 160mAh Li-Polymer battery is the direct replacement for the SportDog SBC-R bark collar. It fits the compact housing of the SBC-R correction module and restores full bark-detection function. Voltage and cell format match the original SAC54-16091 specification exactly.

• SBC-R bark correction circuit: The SBC-R runs its vibration sensor, microcontroller, and correction delivery circuit from a single 3.7V Li-Polymer cell. The flat 34 × 19.80 × 3.20mm form factor is specific to this collar housing — thicker cells will not seat correctly or close the casing.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SBC-R board. The BMS accepted charge termination at 4.2V and held voltage steady across the correction-trigger load without a protection trip.
• Post-replacement activation tip: After installing the new cell, press and hold the collar's mode button for three seconds to wake the microcontroller — the SBC-R firmware does not auto-boot from a fully discharged state and will appear dead until this step is completed.

Why the SBC-R stops triggering corrections before the battery reads empty

The SBC-R correction circuit requires a stable voltage above approximately 3.5V to fire reliably. As a Li-Polymer cell ages, its internal resistance rises, causing voltage to sag under the momentary current spike of each correction pulse. The collar's bark sensor still detects sound, but the correction output falls below threshold and the dog receives no feedback. Swapping the cell restores the voltage headroom the circuit needs to complete each trigger cycle.

Collar shows solid charge indicator but resets to zero correction count each session

A worn cell can hold a surface charge that satisfies the charge-indicator LED while delivering almost no usable capacity under load. The microcontroller loses power during the first active correction burst, resets its session counter, and the cycle repeats. This is not a firmware issue — it is voltage collapse under the correction load. Confirm by measuring the cell under a small load; a healthy cell holds above 3.6V, a failing one will drop below 3.4V immediately.