Symbol MC36 Barcode Scanner Replacement Battery 3.7V 4400mAh

Symbol MC36 — 3.7V Li-ion Replacement Battery

This is a 3.7V 4400mAh Li-ion battery for the Symbol MC36 handheld mobile computer. It fits the MC36 barcode scanner used in retail, warehouse, and logistics environments. Capacity figure is taken directly from product data — 16.28Wh.

• MC36 platform fit: The MC36 runs a single-cell 3.7V architecture. This pack matches that voltage rail and uses the same connector orientation and latch geometry as the original. The BMS handshake with the MC36 dock and host device was verified before listing.
• Bench tested on actual hardware: We cycled this pack through charge, rest, and scan-trigger load sequences on the MC36. The BMS held stable across sustained wireless polling combined with repeated scan-trigger inrush. No false cutoffs were recorded during testing.
• First-shift prep on the MC36: After installing this pack, place the MC36 in its cradle and run a full charge cycle before heading out to the pick floor. Scan-trigger inrush current is highest when the cell sits near minimum voltage — a fully charged cell prevents BMS trips on the first scan burst of the shift.

Cradle showing a charging error on a new pack

A charging error on first dock insertion is almost always a contact resistance issue, not a pack fault. MC36 cradle contacts accumulate oxidation and debris from repeated insertions over a shift. High contact resistance causes the dock to misread the pack's identification signal and throw an error. Wipe the battery contacts and the cradle slots with a dry cloth, reseat firmly, and the error clears in most cases.

Scanner losing wireless connection during rapid scan bursts

During a rapid scan sequence, the MC36 draws simultaneously from the scan engine and the wireless radio. This combined inrush can cause momentary voltage sag on a cell that is below roughly 3.5V. When voltage sags below the radio module's minimum, the wireless stack drops and reconnects. Keep the pack above half charge during high-frequency scanning runs to keep the voltage rail stable under that dual load.