JOSAM Truck Aligner II E-0603 Replacement Battery 7.2V 9000mAh

JOSAM Truck Aligner II — 7.2V Ni-MH Replacement Battery (E-0603)

This is a 7.2V, 9000mAh Ni-MH replacement battery for the JOSAM Truck Aligner II wheel alignment system. It fits the measurement unit directly, using OEM part number E-0603. Capacity is rated at 64.8Wh — sourced to match the original cell configuration in the pack.

• Truck Aligner II compatibility: The Aligner II draws a consistent low-to-mid current load during sensor sweeps and angle calculations. The 7.2V Ni-MH cell stack matches the voltage rail the unit expects, and the BMS handshake does not require reprogramming on swap-in.
• Bench tested on actual hardware: We ran the pack through a full charge-discharge cycle and monitored BMS cutoff behaviour during simulated sensor initialisation. Current draw at probe power-up stayed within BMS threshold — no spurious cutoff events recorded.
• Post-install calibration run: After fitting this pack, run a full calibration cycle through the Aligner II instrument menu before any live alignment session. The unit maps battery state during calibration — skipping this step causes premature low-battery warnings on the first measurement job.

BMS lockout after the Truck Aligner II sat unused in a carry case for months

Ni-MH packs self-discharge over storage. If the Aligner II sat for several months, the pack voltage may have dropped below the BMS recovery threshold — the BMS latches off and the unit shows no response when the power button is pressed. Connect the charger and leave it for at least 90 minutes before attempting to power on. Most BMS circuits on this cell type begin accepting charge again once input voltage is applied, even from a deeply discharged state. If the charger LED does not indicate charging within 10 minutes, disconnect and reconnect — this resets the charge controller's trickle-start logic.

Aligner II shuts off mid-measurement when stepping through angle readings

This is a voltage sag event, not a dead battery. When the Aligner II cycles through multiple sensor channels in sequence, current draw spikes briefly at each channel poll. An aged or partially charged pack sags below the unit's undervoltage cutoff during that spike, triggering an immediate shutdown. A fully charged new pack holds the voltage rail stable through those polling events. Charge the replacement pack to 100% before the first session and confirm the terminal voltage reads at or above 8.4V off the charger before powering the unit on.