JDSU MTS-6000 Replacement Battery 11.1V 7800mAh Li-ion

JDSU MTS-6000 — 11.1V Li-ion Replacement Battery

This 11.1V 7800mAh Li-ion battery replaces the internal pack in the JDSU MTS-6000 optical fiber test platform. The MTS-6000 is a modular field tester used by telecom technicians for OTDR, power measurement, and fiber characterization. It draws sustained current during active test sequences, so cell capacity and BMS stability matter in the field.

• MTS-6000 platform fit: The MTS-6000 uses a multi-cell Li-ion pack at 11.1V nominal to power both the main processing board and the active optical test modules simultaneously. Both subsystems draw from the same rail, so voltage stability across the full discharge curve directly affects measurement accuracy at low state of charge.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles monitoring BMS communication handshake, cutoff thresholds, and cell balancing. The BMS reported correct state-of-charge data to the host device and did not trigger spurious low-battery flags after the first full cycle.
• MTS-6000 startup sequencing: After fitting this battery, allow the MTS-6000 to complete its full power-on self-test without interruption. The device runs a BMS verification pass at startup — cutting power during this window causes a battery fault flag that persists until the unit is fully rebooted with the pack seated.

Why the MTS-6000 rejects a new battery pack on first boot

The MTS-6000 firmware tracks cumulative charge cycles and chemical state through BMS registers. A new cell that has not yet completed one full charge-discharge cycle will report capacity data outside the window the device expects from a calibrated pack. This triggers a battery fault or warning state even when the pack is at full charge. Run one complete charge to 100% followed by a full discharge under normal operating load, then recharge fully — after that cycle the BMS registers align and the fault clears.

Charge indicator stalls below 100% on first charge

On first charge with a new cell, the MTS-6000's charge IC applies a conservative current limit until it has mapped the internal resistance profile of the pack. This causes the charge percentage to plateau — typically between 85% and 95% — for an extended period before completing. This is normal behavior on cycle one and not a fault with the battery or charger. Let the charge cycle complete without interruption; subsequent charges will reach 100% at the normal rate.