About this replacement
DT Systems DT 300 / DT 700 Receiver & Transmitter — 9.6V Ni-MH Replacement Battery
This 9.6V, 300mAh Ni-MH battery fits the DT Systems DT 300 and DT 700 Receiver and Transmitter units used in remote dog training collar systems. It replaces the original rechargeable cell in both the collar-mounted receiver and the handheld transmitter. Voltage and capacity match factory spec — 9.6V, 300mAh (2.88Wh).
- DT 300 and DT 700 shared battery platform: Both the 300 and 700 series receiver and transmitter units run the same 9.6V Ni-MH cell pack. The voltage rail, connector format, and BMS charge profile are identical across all four units, so one battery covers the full set.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the DT 300 receiver platform. The BMS accepted full charge without fault and held voltage within spec under the low-current draw of the collar's signal receiver circuit.
- Post-swap transmitter pairing check: After replacing the transmitter battery, cycle the transmitter off and back on before pressing any correction buttons. Some DT 700 units drop their pairing handshake on power interruption — a full power cycle re-establishes the RF link to the receiver before first use.
Why the DT 300 receiver collar stops responding mid-session
Ni-MH cells in small-format collar packs lose voltage headroom faster as they age. When the pack voltage dips below the receiver's operating floor — typically around 8.4V under load — the unit drops signal response before the indicator shows a fully depleted charge. This is not a transmitter fault. Swapping to a fresh cell at the first sign of sluggish response, rather than waiting for a full cutoff, keeps the training session consistent.
Collar receiver powers on but won't accept a correction signal from the transmitter
A partial battery discharge can corrupt the receiver's active state without fully shutting it down — the LED shows power, but the RF decode circuit is unresponsive. Pull the battery, wait 30 seconds, and reinstall to force a full cold reboot of the receiver firmware. If the transmitter was also on a depleted pack, replace both batteries before re-pairing. Confirm the link by pressing the lowest stimulation level at close range — under 3 metres — before working at distance.