Intermec AB27 PB2 Barcode Scanner Replacement Battery 7.4V

Intermec PB2 / PB3 Series — 7.4V Li-ion Replacement Battery (AB27 / 318-040-001)

This is a 7.4V, 2600mAh Li-ion battery for the Intermec PB2, PB3, PB2A, and FieldPro handheld barcode scanners. It replaces OEM part numbers AB27 and 318-040-001. If your scanner is dying mid-shift or failing to power on, this pack restores it to full operating capacity.

• PB2 / PB3 / PB2A / FieldPro platform fit: These models share the same 7.4V battery architecture, connector pinout, and BMS handshake protocol — one pack covers the entire line without modification or adapter.
• Bench tested on actual hardware: We cycled this pack through simulated scan-burst and wireless polling loads. The BMS held stable across repeated trigger inrush events and maintained cutoff thresholds within spec across the full discharge curve.
• First-shift prep for pick-and-pack operations: Before putting this pack into a high-frequency scanning rotation, seat it in the charging cradle for a complete charge cycle first. Scan trigger inrush current peaks when the cell is near minimum charge — a fully charged pack prevents false BMS trips at the start of a shift.

Cradle showing a charging error on a new AB27 pack

Intermec cradles use contact resistance to verify pack seating before initiating a charge cycle. A new pack with oxidised or dusty contacts can read as a fault even though the battery itself is fine. The cradle will display a charging error or flash an amber LED rather than beginning the charge sequence. Wipe the gold contacts on the pack and the cradle bay with a dry lint-free cloth, reseat the pack firmly, and the cradle should begin charging within 10 seconds.

Scanner losing wireless connection during rapid scan bursts

During rapid barcode scanning, the radio module and the scan trigger fire simultaneously, producing a combined inrush current spike that a low or degraded pack cannot sustain cleanly. The BMS momentarily restricts output to protect the cells, and the radio drops its connection to the access point. This is not a network or firmware issue — it is a power delivery symptom. Charge the pack to at least 4.1V per cell (full charge) before use, and the combined draw stays within the BMS's continuous output threshold.