Unitech MS380 Barcode Scanner Replacement Battery 3.7V 1600mAh

Unitech MS380 Series — 3.7V Li-ion Replacement Battery (1400-900014G)

This 3.7V, 1600mAh Li-ion cell replaces OEM part 1400-900014G in the Unitech MS380 barcode scanner. It fits the MS380 and MS380-CUPBGC-SG variants used in retail, warehouse, and logistics pick operations. Voltage and capacity match the original spec exactly.

• MS380 and MS380-CUPBGC-SG compatibility: Both models share the same battery bay, connector pinout, and BMS handshake protocol — one cell covers the full MS380 platform without modification.
• Bench tested on actual hardware: We cycled this pack through scan-burst loads and wireless polling draws on the MS380 chassis. The BMS held cutoff correctly at low-cell threshold and accepted a full cradle charge without fault codes.
• First-shift preparation: After installing, seat the scanner in its cradle for a complete charge cycle before the first shift. Scan trigger inrush current peaks when the cell is near minimum — a fully charged pack prevents false BMS trips on the first pick run.

Cradle charging error on a freshly installed pack

A new pack sometimes triggers a charging fault on the cradle dock immediately after installation. The cause is almost always contact resistance — either oxidation on the battery terminals or incomplete seating in the bay. Wipe the gold contacts on both the battery and the cradle with a dry cloth, then press the scanner firmly into the dock until it clicks. If the error clears within 30 seconds, contact resistance was the issue, not the cell itself.

Scanner dropping wireless connection during rapid scan bursts

The MS380 draws simultaneously from the radio module and the scan trigger during high-frequency barcode reads. When a degraded or low cell can't supply both loads without voltage sag, the radio stack drops its connection before the scanner shows a low-battery warning. If reconnects happen only during burst scanning and not during idle periods, the cell is the source — not the access point or network config. Charge the pack to full and retest; if sag persists above 3.5V under load, the cell needs replacement.