Itemiser 4DX Replacement Battery 14.4V 6400mAh Li-ion

Itemiser 4DX Handheld Explosive Detector — 14.4V Li-ion Replacement Battery

This 14.4V 6400mAh Li-ion battery fits the Itemiser 4DX Handheld Explosive Detector. The 4DX is a portable trace explosive screening unit used at airports, border crossings, and security checkpoints. It runs ion mobility spectrometry, which draws sustained current from the battery pack during every scan cycle.

• 4DX platform fit: The 4DX uses a 14.4V bus to power both the IMS detection module and the onboard heater array simultaneously. Both loads draw from the same pack. A battery with mismatched voltage tolerance will trip the instrument's protection circuit before the heater reaches operating temperature.
• Bench tested on actual hardware: We cycled this pack through full IMS warm-up sequences and repeated scan loads. The BMS held steady through the combined heater-plus-detector draw without triggering cutoff at operational temperature.
• Post-install calibration requirement: After fitting this battery, run a full calibration cycle through the instrument menu before deploying in the field. The 4DX maps battery state during calibration. Skipping this step causes premature low-battery warnings to appear during the first active screening session, even when the pack is fully charged.

Why the 4DX shuts down at the start of a scan cycle despite showing a charged battery

At scan initiation, the IMS heater array and detector module both power up within milliseconds of each other. This creates a brief but sharp current spike that can exceed the cutoff threshold of a degraded or cold cell pack. The instrument interprets this as an overcurrent event and shuts down as a protective measure — not a software fault. A fresh pack with healthy internal resistance handles the combined inrush without voltage sag dropping below the BMS trip point. If shutdowns occur only at scan start, the pack is the first thing to check, not the instrument firmware.

4DX not recognising a new battery after the unit sat unused for several months

Li-ion cells that sit discharged below approximately 2.5V per cell enter a deep-discharge state where the BMS stops responding to the charger. The instrument sees no pack handshake and either shows no battery indicator or fails to power on. Place the battery on the OEM charger and leave it connected for at least 30 minutes before attempting to power the unit — most BMS circuits require a trickle recovery current to re-initialise the protection IC. If the charger shows no activity after 45 minutes, the cells have self-discharged past the recovery threshold and the pack will need replacing.