Labotect PA-L2 InControl 1050 Replacement Battery 3.7V 1800mAh

Labotect InControl 1050 — 3.7V Li-ion Replacement Battery (PA-L2)

This is a 3.7V, 1800mAh Li-ion battery for the Labotect InControl 1050 laboratory instrument. It replaces OEM part PA-L2 directly. The InControl 1050 is a portable analytical and measurement device used in professional lab and field survey work.

• InControl 1050 pack compatibility: The PA-L2 footprint is specific to this instrument — 54.74 × 34.50 × 11.00mm with a connector and BMS handshake matched to the InControl 1050's power management circuit. Other Labotect packs from adjacent models do not share this profile.
• Bench tested on actual hardware: We cycled this pack through probe initialisation sequences and sustained sensor logging loads. The BMS held above the low-voltage cutoff threshold throughout, and charge acceptance was consistent across multiple cycles with no mid-session drops.
• Calibration cycle before first field deployment: After fitting this pack, run a full calibration cycle through the InControl 1050's instrument menu before taking it into the field. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session, even with a fully charged pack.

BMS lockout after the InControl 1050 sat unused in a carry case for months

Li-ion cells self-discharge slowly during storage. If the InControl 1050 sits unused long enough, the cell voltage drops below the BMS's minimum recovery threshold — typically around 2.5V for this chemistry. At that point, the BMS enters a protection state and blocks both charging and power-on. A standard charger will not recover the pack from this state because it cannot push current past the locked BMS. To recover, apply a trickle charge at a low current using a bench charger with a Li-ion recovery mode, bringing cell voltage up to at least 3.0V before switching to normal charge.

Readings drifting or resetting mid-session during a logging run

Sustained sensor load draws continuous current from the pack, and an aged or partially discharged cell will show a voltage dropout under that load even if the display showed a healthy charge at power-on. That momentary voltage sag is enough to trigger the instrument's under-voltage protection, causing a measurement reset or data interruption without a full shutdown. This is different from a BMS trip at probe power-up — it happens gradually under steady draw, not at the spike moment. If this occurs, charge the pack fully to 4.2V and recheck; if the sag persists on a fresh charge, the cell capacity has degraded and replacement is the correct fix.