KINETIC MH250AAAN6HC Dog Collar Replacement Battery 7.2V 210mAh

KINETIC MH250AAAN6HC — 7.2V Ni-MH Replacement Battery (MH250AAAN6HC)

This is a 7.2V, 210mAh Ni-MH replacement battery for the SportDog remote training collar using OEM part number MH250AAAN6HC. It fits directly into the collar receiver unit and restores full operation of the stimulation, vibration, and tone functions. Dimensions are 31.55 x 20.80 x 23.00mm — verify against your existing cell before installing.

• SportDog MH250AAAN6HC collar fit: This battery matches the voltage rail and physical form factor of the original SportDog receiver cell. Ni-MH chemistry is correct for this platform — do not substitute Li-ion, as the collar's charge circuit is calibrated for Ni-MH delta-V termination.
• Bench tested on actual hardware: We cycled this cell through the collar's onboard charger and confirmed the BMS accepted charge termination correctly. The cell reached rated capacity without triggering premature cutoff on the delta-V curve.
• Collar charging contact care: SportDog charging contacts on the receiver are exposed metal tabs. Mud and moisture from field use build up on those contacts and cause incomplete charge cycles. Clean the contacts with a dry cloth after every outdoor session before docking the collar.

Why Ni-MH cells in training collars lose charge capacity faster than expected

Ni-MH cells are sensitive to shallow cycling — repeated top-up charges without full discharge cycles accelerate capacity fade. The MH250AAAN6HC cell is small at 210mAh, so even modest capacity loss becomes noticeable quickly. Ni-MH also exhibits a memory effect: cells repeatedly charged from 50–60% depletion begin reporting false full-charge states. If the collar is returning to the dock after short sessions every day, run it to the low-battery indicator once every 4–6 weeks to reset the effective capacity baseline.

Collar powers on but stimulation output is weak or inconsistent after battery swap

Weak or erratic stimulation after a new battery install usually means the cell voltage is sitting below 6.8V — either the replacement arrived partially discharged or the first charge cycle terminated early. Ni-MH cells ship in a partially discharged state and need a full charge before the first use session. Dock the collar for a complete uninterrupted charge cycle, then verify the transmitter and receiver are still paired — a power interruption can drop the RF link. If stimulation remains inconsistent, check that the contact probes on the receiver are making firm contact with the dog's coat, as probe length matters for consistent output.