Intermec SF51 Barcode Scanner Replacement Battery 3.7V 2600mAh

Intermec SF51 — 3.7V Li-ion Replacement Battery (318-025-001)

This 3.7V, 2600mAh Li-ion battery replaces the original pack in the Intermec SF51 handheld barcode scanner. It fits the SF51 used across retail, warehouse, and field data collection environments. OEM part numbers 317-018-002, 317-018002A, 1016AB01, and 318-024-002 all cross to this pack.

• SF51 platform fit: The SF51 uses a single-cell 3.7V Li-ion configuration with a specific BMS handshake through the dock connector. This pack matches that communication protocol, so the scanner's charge indicator and battery status readout behave the same as with the original.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the SF51 cradle and confirmed the BMS accepts the charge signal without throwing a fault. Scan trigger inrush and wireless radio draw both registered within normal operating range across the full state-of-charge window.
• First-shift preparation for pick-and-pack use: Place the scanner in its cradle for a complete charge cycle before putting it into rotation. Scan trigger inrush current is highest when the cell is near minimum — a fully charged pack prevents false BMS trips during the first burst of the shift.

Cradle showing a charging error on a new pack

A new Li-ion cell ships at partial charge — typically 40–60% — and some SF51 docks flag this as a fault if contact resistance is also elevated. Wipe the gold contacts on both the battery and the cradle with a dry cloth before reseating. If the error clears within 30 seconds of reseating, the pack is charging normally. If the fault persists, check the dock's contact pins for debris or corrosion before assuming a pack defect.

Scanner dropping wireless connection during rapid scan bursts

The SF51 draws simultaneously from the scan engine and the wireless radio during a fast burst — both loads spike at the same moment. On a degraded or deeply discharged cell, this combined inrush pulls voltage below the radio module's minimum and the connection drops. A fully charged replacement pack with a healthy internal resistance restores the voltage headroom needed to sustain both loads. If dropouts continue after a full charge on the new pack, check the wireless channel congestion or access point distance rather than the battery.