Kathrein MSK15 Replacement Battery 7.2V 2000mAh Ni-MH

Kathrein MSK15 — 7.2V Ni-MH Replacement Battery (6MR2400SCY4C)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Kathrein MSK15 field survey and measurement instrument. It replaces OEM part 6MR2400SCY4C. The MSK15 is used in telecommunications and broadcast site surveys, where a failing battery interrupts logging sessions and measurement cycles in the field.

• MSK15 and Golden Power measuring devices: These instruments share the same 7.2V battery platform, connector pinout, and BMS handshake protocol. A single cell format covers both the MSK15 and compatible Golden Power units without modification.
• Bench tested on actual hardware: We cycled this pack through probe initialisation events and sustained sensor logging loads. The BMS handled the initialisation current spike without tripping, and voltage held within tolerance across a full measurement session.
• Post-install calibration cycle: After fitting this battery, run a full calibration cycle through the MSK15 instrument menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during the first measurement session, even on a fully charged pack.

BMS lockout after the MSK15 sat unused in a carry case for months

Ni-MH cells self-discharge over time. If the MSK15 has been stored for several months, the battery voltage can drop below the BMS recovery threshold. At that point, the BMS enters a protective sleep state and the instrument will not power on or accept a charge. The fix is to apply a slow, low-current charge for 30–60 minutes using a compatible external charger before attempting to power the device. Once voltage climbs above approximately 6.0V, the BMS re-initialises and normal charging resumes.

Readings resetting or drifting mid-session during sustained sensor logging

This happens when the battery voltage sags under sustained sensor load — not a full shutdown, but a brief dropout that causes the MSK15 to reset its active measurement session. An aged or partially discharged pack is the usual cause, because Ni-MH voltage curves drop more steeply toward end of charge than the instrument's display threshold predicts. If you see mid-session resets with the battery indicator still showing charge, check resting voltage with a multimeter — anything below 6.8V under light load means the pack needs replacement before the next deployment.