163890-0001 Honeywell Marathon LXE 11.1V Compatible Battery

Honeywell Marathon LXE / Marathon FX1 — 11.1V Li-ion Replacement Battery (163890-0001)

This 11.1V 1800mAh Li-ion pack replaces the OEM battery in the Honeywell Marathon LXE and Marathon FX1 handheld barcode scanners. Both devices run on the same three-cell 11.1V architecture and use the same connector and BMS handshake, so one part number covers both platforms. Capacity matches the original at 1800mAh (19.98Wh) — no downgrade from the factory spec.

• Marathon LXE and FX1 shared platform: Both scanners draw from the same 11.1V rail with identical connector pinouts and BMS communication protocol. The pack's protection circuit responds to the same charge termination signals the cradle sends, so the dock recognises the new battery without a firmware conflict.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a Marathon LXE cradle. The BMS held cutoff voltage correctly at the low end and the cradle's charge indicator stepped through its stages without error. No false trips on the first full cycle.
• First-shift pre-charge on the Marathon LXE: Place the scanner in its cradle for a complete charge cycle before deploying it in pick-and-pack. Scan trigger inrush current peaks sharply when the cell is near minimum — a fully charged pack prevents false BMS trips that can occur when the first shift starts on a low cell.

Cradle showing charging error on a new pack

A charging error on the Marathon dock after fitting a new battery is almost always a contact resistance issue, not a pack fault. The dock contacts on the scanner base and the cradle pins both oxidise with use, and a new pack with clean terminals highlights the resistance gap. Wipe the battery contacts and the cradle pins with a dry cloth, then reseat the scanner firmly so the contacts fully engage. If the error clears and charging begins, the contacts were the cause — the pack itself is fine.

Scanner loses wireless connection during a rapid scan burst

During a fast scan sequence, the Marathon LXE draws current simultaneously from the laser or imager and the wireless radio. That combined inrush can cause a momentary voltage sag if the battery's internal resistance is elevated — either from age or from a new pack that hasn't completed its first full cycle. The radio drops first because its minimum operating voltage is tighter than the scanner's processor. Fully charge the pack before use and run one complete charge-discharge cycle to condition the cells; the sag on combined draw drops noticeably after the first cycle.