Honeywell EDA50K Replacement Battery 3.8V 4000mAh

Honeywell EDA50K / EDA51K Series — 3.8V Li-ion Replacement Battery (BAT-EDA50K-1)

This is a 3.8V 4000mAh Li-ion battery for the Honeywell EDA50K, EDA51K, EDA51K-0, and ScanPal 50 mobile computers. These rugged handhelds are used in warehouse pick-and-pack, retail inventory, and field data collection. The BAT-EDA50K-1 part number covers the full EDA50K and EDA51K range — one cell fits all four listed models.

• EDA50K, EDA51K, EDA51K-0, ScanPal 50 compatibility: All four models share the same 3.8V battery bay, connector pinout, and BMS handshake protocol. The internal BMS reads the same authentication registers across the EDA50K and EDA51K platforms, so there is no firmware mismatch on swap.
• Bench tested on actual hardware: We ran this pack through scan-burst cycles on the EDA50K bench unit. The BMS held voltage above the scan-trigger floor during rapid successive reads, and the wireless radio stayed connected throughout. No false cutoff events recorded.
• First-shift preparation for pick-and-pack use: After installing this pack, place the scanner in its cradle for a full charge cycle before the first shift. Scan trigger inrush is highest when the cell sits near minimum charge, and starting the shift on a full cell prevents false BMS trips during the first burst-scan run.

Cradle showing a charging error on a freshly installed pack

Honeywell docking cradles use contact-pressure sensing to begin the charge handshake. If the dock throws an error immediately after you drop in a new pack, the most likely cause is elevated contact resistance at the battery terminals, not a fault inside the cell. Warehouse cradles accumulate dust and oxidation on the gold-plated dock pins faster than people expect. Wipe the battery contacts and the cradle pins with a dry lint-free cloth, reseat the unit firmly, and the charge indicator should clear within 30 seconds.

Scanner dropping wireless connection during rapid scan bursts

The EDA50K draws simultaneously from the Wi-Fi radio and the scan trigger during a fast burst-scan sequence. If the cell voltage sags below the radio's minimum operating threshold mid-burst, the Wi-Fi stack disconnects before the BMS trips the whole unit. This shows up as a connection drop with no low-battery warning on screen. Charge the pack to full before the shift and check that the cradle contacts are clean — a dirty contact point adds resistance that accelerates voltage sag under combined load.