HandHeld Nautiz X4 Replacement Battery 3.7V 3600mAh 60-BTSC

HandHeld Nautiz X4 — 3.7V Li-ion Replacement Battery (60-BTSC / NX4-1004)

This 3.7V 3600mAh Li-ion battery replaces the original pack in the HandHeld Nautiz X4 rugged mobile computer. The Nautiz X4 is a field-grade handheld used in warehousing, logistics, and outdoor data collection. Voltage and capacity match the OEM specification so the device powers on and charges through the standard dock without reconfiguration.

• Nautiz X4 fit: The X4 uses a single-cell 3.7V architecture with a BMS that handshakes over the pack's communication pin. This replacement carries the same contact layout and cell voltage range, so the host device reads charge state correctly from first boot.
• Bench tested on actual hardware: We cycled this pack through scan-trigger inrush events and sustained wireless polling loads. The BMS held the low-voltage cutoff at the correct threshold and did not trip under combined radio-plus-imager draw spikes.
• First-shift preparation on the Nautiz X4: Before the first pick-and-pack shift, place the Nautiz X4 in its cradle and run a full charge cycle with the device powered off. Scan-trigger inrush current is highest when the cell is near minimum voltage — a fully charged cell prevents false BMS trips during the first burst of rapid scanning.

Cradle showing a charging error on a new pack

The Nautiz X4 dock reads pack state through the battery contacts before enabling the charge circuit. If the contact pads on the new pack or the cradle have oxidation or residue from the previous battery, the dock sees elevated resistance and flags a charge fault. This is a contact issue, not a cell fault. Wipe the gold contacts on both the battery and the cradle with a dry cloth, reseat the pack firmly, and the charging indicator should clear within 30 seconds.

Scanner dropping wireless connection during rapid scan bursts

On the Nautiz X4, the imager and the wireless radio draw simultaneously during a rapid scan sequence. If the cell voltage sags below approximately 3.4V under that combined load, the radio subsystem browns out first — the scanner appears to scan but the data never transmits. This typically happens late in a shift when the pack is partially depleted. Returning the unit to the cradle for a top-up charge and confirming the battery indicator reads above 50% before re-entering the pick zone resolves the drop-outs.