About this replacement
FARO 3D Laser Scanner M70 / S70 / S150 — 14.4V Li-ion Replacement Battery (ACCSS8001)
This 14.4V, 6400mAh (92.16Wh) lithium-ion battery replaces the FARO OEM part ACCSS8001. It fits the FARO 3D Laser Scanner range including the M70, S70, and S150 models used in surveying, construction documentation, and industrial measurement. The pack slots into the same battery bay and connects to the same BMS communication bus as the original.
- M70 / S70 / S150 compatibility: These three scanner models share a common 14.4V power architecture and the same physical connector and BMS handshake protocol. One pack covers all three variants without any adapter or firmware workaround.
- Bench tested on actual hardware: We cycled this pack through scanner power-up, active scanning load, and USB data transfer to a connected PC. The BMS held voltage within spec across all three load states and did not trip on the combined draw during file offload.
- First-deployment calibration step: After installing this pack, run a full calibration cycle through the scanner's instrument menu before heading to site. The scanner maps battery state during calibration — skipping this step causes the low-battery warning to trigger early on the first real measurement session, even with a full charge.
BMS cutoff at scan initialisation — why the scanner shuts down the moment it starts a scan
When the FARO scanner begins a scan session, the spinning mirror motor and laser module draw a sharp current spike in the first two to three seconds. On a degraded or deeply discharged pack, that spike can push the instantaneous draw past the BMS overcurrent threshold, tripping a protective cutoff before the scan even registers. This looks identical to a dead battery — the scanner simply goes dark. A pack sitting at or above 14.0V under no-load should survive the motor-start surge without tripping; if yours cuts out at that voltage, the cells are no longer delivering adequate instantaneous current and the pack needs replacement.
Scanner not recognising a new pack after it sat unused in a carry case
Li-ion packs that sit uncharged for several months can self-discharge below the BMS recovery threshold — typically around 10.0–10.5V for a 14.4V nominal pack — at which point the BMS enters a sleep state and the scanner sees no battery at all. The fix is a slow pre-charge: connect the pack to the OEM charger and leave it for 30–60 minutes before powering the scanner. Most chargers apply a low-current recovery pulse at voltages below the normal charge acceptance floor. If the charger light never transitions from fault to charge mode, the pack has dropped below recoverable voltage and the cells are unlikely to accept a safe charge cycle.