SportDog DC-17 SD-350 Replacement Battery 4.8V 150mAh

SportDog SD-350 / Field Trainer SD-400 Series — 4.8V Ni-MH Replacement Battery (DC-17)

This is a 4.8V, 150mAh Ni-MH replacement battery for the SportDog SD-350, Field Trainer SD-400, Wetland Hunter SD-400, Wetland Hunter SD-800, and compatible collar receivers. It slots into the same space as the original DC-17 and restores power to the collar's stimulation and tone functions. Dimensions are 31.30 x 21.56 x 11.04mm — verify yours before ordering if you have a variant model.

• SD-350 and SD-400 series compatibility: These collars share the same 4.8V NiMH cell pack, connector footprint, and BMS handshake across the receiver lineup. One battery spec covers the full family because SportDog standardised the power module from the SD-350 through the Wetland Hunter SD-800.
• Bench tested on actual hardware: We cycled this cell pack through charge and discharge on SD-400 series receivers. The BMS accepted charge without flag errors, and stimulation output remained consistent across the discharge curve down to cutoff.
• Post-install NiMH conditioning on the SD-350: NiMH cells at rest for shipping may show reduced initial capacity. Run two full charge-discharge cycles through the collar's charger before field use — the cell chemistry recovers its rated 150mAh capacity after cycling, not straight out of the pack.

Why the SD-350 collar receiver loses stimulation output before the low-battery indicator triggers

NiMH cells hold a relatively flat voltage curve through most of their discharge, then drop sharply near the end. The SD-350's low-battery threshold is calibrated to catch this drop, but stimulation intensity can start to weaken before the indicator fires — because the cell voltage sags under the load of the stimulation circuit sooner than it sags at idle. If correction output feels inconsistent in the field, check the charge level even if no indicator is showing. A fresh charge resolves it immediately.

Collar receiver not responding to the remote after battery replacement

Swapping the battery cuts power to the receiver's memory, which can drop the paired link to the SD-350 remote transmitter. This is not a battery fault — it is a pairing reset triggered by power interruption. To restore it, put the receiver collar back into pairing mode by holding the receiver button until the LED flashes, then press the transmitter button to re-link. Confirm the link is live before the next training session by testing at close range first.