Symbol F5040A Barcode Scanner Replacement Battery 3.7V 2600mAh

Symbol BCS1002 / PS3050 Series — 3.7V Li-ion Replacement Battery (F5040A)

This is a 3.7V, 2600mAh Li-ion cell built to the F5040A specification. It fits the Symbol BCS1002, FNN7810A, and PS3050 handheld barcode scanners. Swap it when your original pack no longer holds a charge through a full warehouse shift.

• BCS1002 / PS3050 platform fit: These models share the same battery bay dimensions, 3.7V rail, and connector pinout. The BMS handshake protocol is identical across the group, so one cell covers the full platform without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a BCS1002 unit. The onboard BMS responded correctly at both low-voltage cutoff and full-charge termination — no false trips, no charge errors on the host dock.
• First-shift preparation: After installing, seat the scanner in its cradle and run a complete charge cycle before the first pick-and-pack shift. The scan trigger draws peak inrush current at low state-of-charge — a fully charged cell prevents the BMS from tripping on the first burst of back-to-back scans.

Cradle showing a charging error on a new pack

A charging error on a freshly installed F5040A is almost always a contact resistance issue, not a faulty cell. The BCS1002 cradle reads pack state through the same gold-plated contacts it uses to deliver charge current. Oxidation or debris on either the pack or cradle contacts raises resistance enough for the dock to flag an error. Wipe both contact strips with a dry lint-free cloth, reseat the pack firmly, and the error clears in most cases within one charge cycle.

Scanner dropping wireless connection during rapid scan bursts

The BCS1002 pulls current from two sources simultaneously during a rapid scan sequence — the laser or imager and the wireless radio. Combined inrush can cause a momentary voltage dip on a partially discharged cell. When the rail dips below the radio module's minimum operating voltage, the wireless link drops even though the scanner stays powered. Start each shift with a fully charged pack — at 3.7V nominal and above, the cell has enough headroom to absorb both loads without the voltage sag that kills the connection.