Leuze HS6578 Replacement Battery 3.7V 2600mAh Li-ion

Leuze HS6578 — 3.7V Li-ion Replacement Battery (50120448)

This 3.7V 2600mAh Li-ion battery replaces the original pack in the Leuze HS6578 handheld barcode scanner. The HS6578 is a linear imaging scanner used across retail, logistics, and warehouse pick-and-pack operations. Capacity matches the factory spec at 9.62Wh, so shift endurance stays consistent with what users expect from the original.

• HS6578 platform fit: The HS6578 uses a single-cell 3.7V Li-ion pack with a BMS that monitors cell voltage and temperature before enabling the scan trigger and wireless radio. This replacement matches the original connector pinout and BMS communication protocol, so the scanner powers on and authenticates normally without throwing a pack-fault error.
• Bench tested on actual hardware: We cycled this pack through repeated scan-trigger and wireless radio draw sequences on the HS6578. The BMS held stable through sustained burst scanning and did not trip under the combined inrush load of the imager and radio polling.
• First-shift cradle protocol: After installing this pack, seat the scanner in its charging cradle and run a full charge cycle before pulling it for use. Scan-trigger inrush current peaks when the cell is near minimum voltage — a pre-charged cell prevents the BMS from tripping on the very first barcode read of the shift.

Cradle showing a charging error on a new pack

Charging errors on the HS6578 cradle are usually caused by high contact resistance between the dock pins and the battery terminals, not a fault in the pack itself. Oxidation or debris on the gold contacts breaks the voltage handshake the cradle uses to initiate charge. Wipe the battery contacts and the cradle pins with a dry lint-free cloth, then reseat the scanner firmly until it clicks. If the error clears, the pack is good — check cradle contacts routinely to keep resistance below the dock's threshold.

Scanner loses wireless connection during rapid scan bursts

During fast sequential scanning, the imager and wireless radio draw current simultaneously, creating a combined inrush spike that can drag cell voltage below the BMS's cutoff threshold. When that happens, the radio drops first — the scanner stays on but loses its connection to the host before the imager resets. A cell with low state of charge makes this worse because internal resistance rises as voltage falls. Charge the pack to 4.2V before a high-throughput shift and the combined inrush stays within the BMS's operating window.