Leica BLK3D Imager 872766 Replacement Battery 3.85V 4000mAh

Leica BLK3D Imager — 3.85V Li-Polymer Replacement Battery (872766)

This 3.85V, 4000mAh Li-Polymer battery fits the Leica BLK3D Imager and BLK3D Imager Premium handheld 3D imaging systems. It replaces OEM part numbers 872766, RRC1130, and 110019-08 directly. The slim 83.60 × 61.00 × 6.60mm cell slots into the same bay as the factory pack.

• BLK3D Imager and BLK3D Imager Premium compatibility: Both devices share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell covers the full range without modification.
• Bench tested on actual hardware: We ran this pack through the BLK3D's startup sequence, sensor initialisation, and sustained imaging load. The BMS held stable voltage across the full discharge curve without triggering a low-power cutoff during active scanning.
• Post-install calibration — run it before your first field session: After fitting this pack, run a full calibration cycle through the BLK3D instrument menu before deployment. The imager maps battery state during calibration, and skipping this step causes premature low-battery warnings during your first measurement session — even with a fully charged cell.

BMS lockout after the BLK3D Imager sat unused in a case for months

Li-Polymer cells self-discharge slowly during storage. If the BLK3D sat in a carry case for an extended period, the pack voltage can drop below the BMS recovery threshold — typically around 3.0V per cell — causing the protection circuit to open and block normal charging. The charger sees no load and stops. To recover the pack, apply a trickle charge at a low current using a compatible Li-Polymer charger with a recovery or wake mode until cell voltage rises above 3.2V, then switch to standard charge.

BLK3D shuts down mid-scan even though the battery indicator shows charge remaining

This happens when the voltage indicator on the display has not yet recalibrated to the new cell's discharge curve. The imager's fuel gauge was tuned to the old, degraded pack — it reads remaining charge inaccurately until it logs a full discharge cycle. Run the battery from a full charge down to the automatic cutoff point without interrupting the session. After one complete cycle, the indicator recalibrates and low-battery warnings align with actual cell voltage.