Teledyne PMAT 2000 Replacement Battery 11.1V 5200mAh

Teledyne PMAT 2000 — 11.1V Li-ion Replacement Battery

This 11.1V 5200mAh (57.72Wh) lithium-ion battery is a direct replacement for the Teledyne PMAT 2000 data acquisition instrument. The PMAT 2000 is a portable geotechnical and environmental field survey device, and this pack matches its voltage rail and physical format. Dimensions are 214.60 × 52.52 × 19.50mm.

• PMAT 2000 field instrument fit: The PMAT 2000 draws variable current as it powers sensors and logs data simultaneously. This pack's cell configuration holds the 11.1V nominal rail steady under that combined load without the BMS triggering a protective cutoff during active measurement cycles.
• Bench tested on actual hardware: We cycled this pack under a simulated probe-initialisation load — the short current spike at sensor power-up that trips weaker packs. The BMS held the output rail and recovered cleanly without a lockout event.
• Pre-deployment calibration cycle: After fitting this battery, run a full calibration sequence through the PMAT 2000's instrument menu before your first field session. The instrument maps battery state during calibration, and skipping this step causes premature low-battery warnings mid-survey even when the pack carries a full charge.

BMS lockout after the PMAT 2000 sat unused in a carry case for months

Li-ion cells self-discharge slowly in storage. If the PMAT 2000 sat packed away for several months, the battery voltage can drop below the BMS's minimum recovery threshold — typically around 2.5V per cell, or roughly 7.5V for an 11.1V three-cell pack. At that point the BMS enters a deep-discharge lockout and the instrument won't power on at all. Connect the pack to its charger and leave it for at least 90 minutes even if no charge indicator appears immediately — most chargers apply a trickle recovery current before switching to full charge. If voltage climbs above the threshold, the BMS will unlock and normal charging resumes.

Readings drifting or logging session resetting mid-survey

This failure differs from a clean shutdown — the PMAT 2000 stays on but logged data becomes unreliable or the session resets without warning. The cause is a momentary voltage dropout under sustained sensor load, where the battery voltage sags below the instrument's internal operating threshold for long enough to reset the acquisition module. A pack with degraded cells shows a healthy resting voltage but cannot hold it under continuous draw. Check the pack's resting voltage after a full charge — it should read at or above 12.4V. If it reads below 12.0V at rest, the cells have lost capacity and the pack needs replacement.