SportDog SDT54-16750 GPS Dog Collar Replacement Battery 3.7V 500mAh

SportDog SD-575 / SD-575E Training Collar — 3.7V Li-Polymer Replacement Battery (SDT54-16750)

This 3.7V 500mAh Li-Polymer battery replaces OEM part SDT54-16750 in the SportDog SportTrainer SD-575 Black Edition and SD-575E Orange Edition training collars. It fits the compact receiver unit worn by the dog and restores full collar function when the original cell no longer holds a charge. Capacity matches the factory spec at 500mAh (1.85Wh).

• SD-575 and SD-575E receiver compatibility: Both collar variants — Black Edition and Orange Edition — use the same receiver housing and share the SDT54-16750 cell. The connector pinout, BMS handshake voltage, and physical footprint (37 × 25 × 6mm) are identical across both, so one replacement cell covers either model.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SD-575 receiver. The BMS accepted the cell without fault codes, balanced to 4.2V at full charge, and held the low-voltage cutoff at the expected threshold before triggering protection mode.
• Post-swap collar activation: After fitting this battery, press and hold the collar's power button for three full seconds — a brief press will not complete the boot sequence. The LED confirmation flash indicates the collar is live and ready to pair with the handheld transmitter.

Why the SD-575 receiver drains faster in areas with heavy vegetation or terrain

The SD-575 receiver relies on radio frequency communication with the handheld transmitter. Dense tree cover, hills, or buildings force the transmitter to push signal harder and the receiver's internal circuitry works at a higher duty cycle to stay in range. That increased RF load draws more current from the 500mAh cell than open-field use does. If your dog works in heavy cover regularly, expect shorter intervals between charges compared to the rated cycle in open terrain.

Collar powers on but transmitter shows "out of range" immediately after battery swap

This happens when the collar receiver boots but hasn't completed its pairing handshake with the transmitter. The SDT54-16750 cell powers a microcontroller that re-registers with the transmitter on every cold start — if the collar powers on before the transmitter is active, the handshake fails. Power the handheld transmitter on first, wait five seconds, then power the collar receiver. If the "out of range" indicator persists, hold both units within 1 metre and repeat the pairing sequence from the transmitter menu.