About this replacement
Dogtra YS-300 Bark Collar — 3.7V Li-Polymer Replacement Battery (BP-37Y)
This 3.7V, 300mAh Li-Polymer battery replaces the original BP-37Y cell in the Dogtra YS-300 and YS300 bark control collar. It powers the collar's correction circuit and detection electronics. The cell measures 30.00 x 15.50 x 7.20mm — verify your existing cell matches before ordering.
- YS-300 and YS300 fit: Both model designations use the same collar housing, the same BP-37Y connector pinout, and the same BMS handshake voltage threshold. One cell covers both.
- Bench tested on actual hardware: We cycled this cell through the YS-300's charge circuit and confirmed the BMS accepted the cell without fault flags, held charge correctly, and released current to the correction circuit under load.
- Post-swap activation tip: After fitting a new cell, give the collar a full charge before the first bark event. The YS-300's sensitivity circuit recalibrates on first trigger after a power interruption — a partially charged cell can cause the collar to under-deliver or skip corrections entirely.
Why the YS-300 stops correcting mid-session after a battery swap
The YS-300 draws a brief surge of current each time it fires a correction. A degraded or partially charged Li-Polymer cell sags below the collar's minimum operating voltage during that draw, tripping the low-voltage cutoff in the BMS. The collar goes silent even though the indicator light may still show power. A fresh, fully charged BP-37Y cell holds voltage steady across the correction pulse and keeps the circuit active throughout the session.
Collar not responding to bark detection after new battery installed
If the collar powers on but doesn't trigger on barking, the vibration and sound sensor calibration may not have reset properly after the power interruption. Remove the battery, wait 30 seconds, reinstall, and charge to full before testing. Place the collar on the dog and allow two or three test barks in a quiet environment so the sensor baseline can settle. If the collar still doesn't respond, check that the contact points are seated against skin and the sensitivity dial is set above the minimum position.