KOAMTAC KDC30 Barcode Scanner Compatible Battery 3.7V 1100mAh

KOAMTAC KDC30 / KDC350 / KDC400 Series — 3.7V Li-ion Replacement Battery (699800)

This 3.7V, 1100mAh Li-ion cell replaces the original battery in the KOAMTAC KDC30, KDC350, KDC400, and KDC410 barcode scanners. It matches the OEM part numbers 699800, KDC-BAT400, and KDCSPB1200. Same voltage, same form factor, same connector — drop the cell in and the scanner powers on.

• KDC30 / KDC350 / KDC400 / KDC410 compatibility: These models share the same 3.7V battery bay, connector pinout, and BMS communication protocol, which is why a single cell covers the whole line. Swapping between any of them requires no adapter or firmware change.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a KDC400 test unit. The BMS accepted the pack without a protection-trip error, and the scanner's charge indicator moved through its normal stages without stalling.
• First-shift preparation for pick-and-pack environments: After installing, seat the scanner in its cradle and run a full charge cycle before putting it into rotation. The scan trigger draws the highest inrush current when the cell is near minimum — a fully charged pack on the first shift prevents false BMS trips during rapid barcode bursts.

Cradle showing a charging error on a new pack

KOAMTAC cradles use a contact-resistance check during the handshake phase before charging begins. If the gold contacts on the battery or the dock pins have any oxidation or debris, resistance reads high and the cradle flags a charging fault. This is not a cell fault — it is a contact fault. Wipe the battery contacts and dock pins with a dry lint-free cloth, then reseat the scanner firmly until you hear the click. The charging LED should switch to amber within 10 seconds of a clean reseat.

Scanner losing wireless connection during rapid scan bursts

The KDC series sends scanned data over Bluetooth while the imager is still active, which means the radio and scan engine draw current at the same time. On a partially depleted cell, this combined inrush can pull voltage below the BMS's floor threshold, causing a momentary power collapse that drops the Bluetooth link. The scanner reconnects after a second or two, but the pairing session restarts and queued data may not transmit. Keep the cell above 3.6V during high-frequency scan sessions — if disconnects increase toward the end of a shift, the cell needs charging before the next run.