Metrologic SP5600 Replacement Battery 3.7V 1800mAh Li-ion

Metrologic SP5600 / SP5600 Datacollector — 3.7V Li-ion Replacement Battery

This 3.7V, 1800mAh Li-ion cell replaces the original battery in the Metrologic SP5600 and SP5600 Datacollector handheld scanners. These units are common in retail point-of-sale and warehouse inventory workflows where the scanner runs continuously across full shifts. The pack ships at a partial state of charge and needs a full cycle in the cradle before active use.

• SP5600 and SP5600 Datacollector compatibility: Both variants share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — one pack covers both units without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles monitoring BMS cutoff thresholds. The cell held stable voltage through repeated scan-trigger inrush events and maintained BMS communication throughout.
• First-shift preparation: Place the scanner in its cradle and run a complete charge cycle before deploying on the pick floor. Scan-trigger inrush current is highest when the cell is near minimum voltage — a fully charged pack prevents false BMS trips on the first shift pull.

Cradle showing a charging error on the new pack

Charging docks on the SP5600 series read the pack through spring-loaded contacts on the battery base. Oxidation or shipping residue on those contacts raises contact resistance enough to break the charge handshake, and the dock flags it as an error rather than a bad cell. Remove the battery, wipe all gold contacts on both the pack and the cradle with a dry cloth, reseat firmly, and the error clears in most cases. If the error persists after cleaning, check the cradle contacts for physical damage or debris lodged between the springs.

Scanner losing wireless connection during rapid scan bursts

The SP5600 draws from the same cell for both the scan engine and the wireless radio simultaneously. During a rapid burst scan sequence, the combined inrush pulls the cell voltage down momentarily — if the pack is already depleted, this sag can trip the BMS undervoltage cutoff and drop the wireless link mid-session. The fix is not to slow scanning but to return the scanner to the cradle before the battery indicator hits the first low warning. A fresh, fully charged pack from a worn one raises the voltage floor enough to handle combined peak draw without the BMS intervening. Target cell voltage above 3.5V before starting a high-frequency scan run.