About this replacement
Dogtra Transmitter iQ Series — 3.7V Li-Polymer Replacement Battery (BP37T)
The BP37T is a 3.7V, 450mAh Li-Polymer battery for the Dogtra Transmitter iQ, iQ Plus remote transmitter, and DA210. It powers the handheld remote that sends stimulation and tone signals to compatible Dogtra collar receivers. Swap this in when the transmitter no longer holds a charge through a full training session.
- Transmitter iQ and DA210 compatibility: These remotes share the same battery bay dimensions and the same 3.7V single-cell Li-Polymer voltage rail. The BP37T fits all of them without modification — same connector orientation, same BMS communication protocol.
- Bench tested on actual hardware: We ran the BP37T through charge and discharge cycles on the Transmitter iQ platform. The BMS responded correctly to the charger handshake, held voltage within spec across the discharge curve, and triggered the low-cell protection cutoff cleanly at the expected threshold.
- First charge after install: Plug the transmitter into the Dogtra charger and allow a full charge cycle to complete before pairing with a collar. The Li-Polymer cell needs one full charge to calibrate the fuel gauge indicator — partial first charges cause the battery indicator to read inaccurately during sessions.
Why the Transmitter iQ shows a full charge but dies quickly
A Li-Polymer cell that has been over-discharged loses usable capacity even after it accepts a full charge. The battery charger restores voltage to the cell, but the internal capacity is degraded — the fuel gauge reads the surface voltage, not the actual stored energy. This is why a transmitter can show full bars and then cut out after a short time in the field. The fix is a replacement cell, not a longer charge.
Transmitter iQ not turning on after the battery sits unused for weeks
Li-Polymer cells self-discharge when stored, and the Dogtra transmitter draws a small standby current even when switched off. If the cell drops below approximately 2.5V, the BMS enters deep-discharge lockout and the transmitter will not power on. Plug it into the Dogtra charger and leave it connected for at least 30 minutes — the charger's trickle stage will bring the cell back above the BMS re-enable threshold. If the transmitter still does not power on after 30 minutes on charge, the cell is below recovery voltage and needs replacing.