KOAMTAC KDC-250 Barcode Scanner Replacement Battery 3.7V 950mAh

KOAMTAC KDC-250 / KDC-300 — 3.7V Li-ion Replacement Battery (KDC-BAT180)

This 3.7V 950mAh Li-ion pack replaces the OEM KDC-BAT180 battery in the KOAMTAC KDC-250 and KDC-300 handheld barcode scanners. Both models share the same battery bay dimensions, connector, and BMS handshake protocol. Cell capacity matches the original 3.52Wh rating listed in product data.

• KDC-250 and KDC-300 compatibility: Both scanners run the same 3.7V power rail and use an identical battery bay footprint of 39.20 × 30.00 × 9.20mm. The BMS negotiation is the same across both units, so one replacement pack covers either device without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a KDC-250 unit. The BMS accepted the cell without error flags, balanced charge termination triggered correctly at full voltage, and scan-trigger inrush current stayed within the protection circuit's threshold throughout testing.
• First-shift preparation for pick-and-pack use: After installing this pack, seat the scanner in its cradle and complete a full charge cycle before putting it into active rotation. Scan trigger inrush current peaks when the cell is near minimum state of charge, and a depleted new pack on a first scan burst can trip the BMS prematurely.

Cradle showing a charging error after fitting a new pack

The KDC cradle communicates with the battery through spring-loaded dock contacts on the base of the scanner. If those contacts carry any oxidation, skin oils, or debris from handling, the dock reads elevated contact resistance and flags a charging fault before current even flows. This is not a cell defect — it is a contact problem. Wipe the gold contacts on both the battery and the cradle dock with a dry lint-free cloth, reseat the scanner firmly, and the charge indicator should clear within 30 seconds.

Scanner dropping wireless connection during rapid scan bursts

During a fast scan sequence, the KDC-250 draws current simultaneously from the laser or imager and the Bluetooth radio. That combined inrush can briefly pull cell voltage below the radio module's minimum operating threshold, causing the wireless link to drop. This happens most often when the battery is below 20% charge. The fix is to keep the pack above that threshold during high-frequency scan sessions — if the connection drops mid-shift, dock the scanner briefly to recover voltage above 3.6V before resuming.