Honeywell 99EXhc Compatible Battery 3.7V 2400mAh Li-ion

Honeywell Dolphin 99EX / 99GX — 3.7V Li-ion Replacement Battery (99EX-BTEC-1)

This 3.7V, 2400mAh Li-ion battery replaces the OEM pack in the Honeywell 99EXhc, 99GX, Dolphin 99EX, and Dolphin 99EX-BTEC handheld barcode scanners. These are mobile data collection devices used in retail, logistics, and warehouse pick-and-pack operations. It matches the OEM voltage, capacity, and connector to keep the scanner running through extended shifts without reconfiguration.

• 99EX and 99GX platform fit: The 99EXhc, 99GX, and Dolphin 99EX variants share the same battery bay dimensions, 3.7V voltage rail, and dock-charging contact layout. One pack covers all four models without adapter or modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a 99EX unit. The BMS responded correctly to the cradle charge signal, balanced cells during charge, and tripped cutoff cleanly at minimum cell voltage without false shutdowns.
• First-shift charging protocol: After installing, seat the scanner in its cradle and run a full charge cycle before triggering any scans. The scan trigger inrush current is highest when the cell is near minimum voltage — starting a shift on a partially charged new pack can trip the BMS before the cell has been conditioned.

Cradle showing charging error on a new pack

The Dolphin 99EX cradle reads battery state through the dock contacts on the base of the pack. If those contacts have oxidation, skin oils, or residue from packaging, the dock sees elevated resistance and flags a charging fault — even though the pack itself is fine. The cradle firmware interprets high contact resistance as a damaged or incompatible cell. Wipe the gold contacts on the battery and the dock with a dry lint-free cloth, reseat the scanner firmly, and the charge indicator should clear within 30 seconds.

Scanner losing wireless connection during rapid scan bursts

During a high-frequency scan burst, the 99EX draws simultaneously from the imager, the processor, and the wireless radio. This combined inrush can cause a momentary voltage sag on a cell that is already below 3.5V. The BMS reads that sag as an under-voltage event and throttles output, which drops the radio link before the scanner shuts down entirely. Keep the battery above the halfway charge mark during high-volume picking sessions — if dropouts occur consistently, charge the pack before starting the next batch rather than running it to cutoff.