Honeywell BATT-EDA40-1 Scanpal EDA50K Compatible Battery 3.8V 4000mAh

Honeywell Scanpal EDA50K — 3.8V Li-Polymer Replacement Battery (BATT-EDA40-1)

This is a 3.8V, 4000mAh Li-Polymer battery that replaces the original pack in the Honeywell Scanpal EDA50K handheld barcode scanner. It also fits the EDA40, EDA50, and EDA50hc. OEM part numbers BATT-EDA40-1, BAT-EDA50, BAT-EDA50US, 50134176-001, and 50129589-001 all reference this same cell configuration.

• EDA40 / EDA50 / EDA50K / EDA50hc platform compatibility: These scanners share a common battery bay geometry, contact layout, and BMS handshake protocol. The 3.8V nominal rail and Li-Polymer cell format are consistent across all listed models, so one pack covers the full EDA family listed here.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the EDA50K platform. The BMS handshook cleanly on first contact, charge acceptance was normal from the dock, and the protection circuit responded correctly at both undervoltage and overvoltage thresholds.
• First-shift preparation for pick-and-pack operations: Place the scanner in its cradle for a full charge cycle before the first active shift. Scan trigger inrush current peaks when the cell is near minimum, and a pre-charged pack prevents false BMS trips when scan burst frequency is highest at shift start.

Cradle showing a charging error on a new pack

The EDA50K charging dock reads battery state through four gold contact pins on the pack face. If even one pin has surface oxidation, adhesive residue from packaging, or is slightly misaligned in the bay, the cradle reports a charge fault instead of initiating the charge cycle. This is a contact resistance issue, not a cell fault. Wipe the pack contacts with a dry cloth, reseat the scanner firmly until the bay latch clicks, and confirm the charge indicator activates within 30 seconds.

Scanner losing wireless connection during rapid scan bursts

During high-frequency scan bursts, the EDA50K draws simultaneously from the imager, the Wi-Fi radio, and the CPU processing the decoded data. Combined inrush from all three subsystems can cause a momentary voltage sag on a degraded or deeply discharged cell. The BMS interprets this sag as an undervoltage event and throttles output, which drops the wireless link before the cell actually reaches cutoff. Charge the pack to at least 3.9V per cell before a high-throughput shift to keep the voltage rail stable under combined load.