X-Rite Coloreye XTH Replacement Battery 7.2V 1800mAh

X-Rite Coloreye XTH — 7.2V Ni-MH Replacement Battery (GM17017780)

This is a 7.2V, 1800mAh Ni-MH replacement battery for the X-Rite Coloreye XTH portable spectrophotometer. It fits the Coloreye XTH directly, restoring field-ready power to the instrument. Voltage and capacity match the OEM specification: 7.2V, 1800mAh (12.96Wh).

• Coloreye XTH compatibility: The XTH shares its battery bay and connector format across its production run. This pack matches the cell count, voltage rail, and physical envelope the instrument expects. No modifications needed to seat the pack correctly.
• Bench tested on actual hardware: We ran this pack through a simulated XTH measurement cycle — cold boot, white calibration tile sequence, repeated spectral reads. The BMS held voltage steady across the sensor activation spikes at startup and did not trip the protection circuit during sustained measurement loads.
• First-use calibration before field deployment: After installing this pack, run a full calibration cycle through the instrument menu before taking production measurements. The XTH maps battery state during calibration, and skipping this step causes the instrument to throw premature low-battery warnings partway through your first measurement session.

BMS trip during white-tile calibration at cold startup

When the Coloreye XTH initialises its light source and sensor array, the current draw spikes sharply in the first two seconds. A Ni-MH pack that has been stored discharged or is at low state of charge may drop below the BMS protection threshold at exactly this moment, triggering a cutoff that looks like a dead battery. Charge the replacement pack fully before first use — not a partial charge. Once the pack is at full charge, the voltage holds above the trip threshold during that startup spike and the instrument completes calibration normally.

Spectrophotometer shuts down mid-measurement without a low-battery warning

This is a voltage sag failure, not a capacity failure. During a sustained logging session, the sensor and processor draw a combined load that causes cell voltage to drop faster than the instrument's indicator can track. The display still shows an adequate charge level, then the unit cuts out. It happens most often during consecutive rapid measurements — print-run sampling, textile roll checks — where the instrument never gets a rest between reads. Slowing the measurement cadence slightly will spread the load; if the shutdowns continue, the original pack's cells have likely degraded past recovery and this replacement will resolve it.