Dogtra BP74R Receiver 2500T Replacement Battery 7.4V 460mAh

Dogtra Receiver 2500T / 2502T Series — 7.4V Li-Polymer Replacement Battery (BP74R)

This is a 7.4V, 460mAh Li-Polymer battery for Dogtra receiver collars, including the 2500T, 2500B, 2502T, and 2502B. It replaces OEM part BP74R directly. The receiver unit sits on the dog's collar and takes signals from a handheld transmitter — this battery keeps that link alive during training.

• 2500 and 2502 receiver compatibility: Dogtra built the 2500 and 2502 receiver housings around the same physical bay, voltage rail, and connector pinout. Both series draw from a 7.4V cell with the same BMS handshake, so a single BP74R cell serves all four variants without modification.
• Bench tested on actual hardware: We ran the BP74R on a 2500T receiver and confirmed the BMS accepted the cell, balanced charge terminated correctly, and the collar powered through the full stimulation range without a protection cutoff.
• First power-on after battery swap: After installing a fresh cell, hold the power button until the collar LED confirms a solid link to the transmitter before putting it on the dog — a partial handshake will show a flashing status light and the collar won't respond to commands.

Why the 2500T receiver collar loses transmitter link mid-session

The 2500T receiver runs its RF module and stimulation circuit from the same 7.4V cell. As the battery ages and internal resistance rises, voltage sags during a stimulation pulse — a momentary drop the BMS can read as a low-cell event. The collar drops the transmitter link as a protective response, not a signal issue. Replacing the BP74R cell restores the voltage headroom that prevents those mid-session dropouts.

Collar powers on but stimulation output is weak or absent

Weak or missing stimulation with a collar that still powers on usually points to a cell that holds surface voltage but collapses under load. The battery rests at 7.4V on a multimeter but drops below 6.8V the moment the stimulation circuit draws current — that's below the threshold the output stage needs to fire correctly. Swap the BP74R cell and check that it charges to at least 8.3V fully charged before reinstalling. If the new cell doesn't reach 8.3V at charge completion, the charger port or charge cable is the next thing to check.