Leuze IT 1452 Barcode Scanner Compatible Battery 3.7V 3400mAh

Leuze IT 1452 / IT 3820 Series — 3.7V Li-ion Replacement Battery (50105384)

This 3.7V 3400mAh Li-ion battery replaces OEM part 50105384 in the Leuze IT 1452, IT 1902G, IT 3820, and IT 4820 handheld barcode scanners. These are mobile data terminals used in warehouse pick-and-pack, inventory scanning, and logistics operations. Dimensions are 99.40 × 20.80 × 21.40mm — verify against your original pack before installing.

• IT 1452, IT 1902G, IT 3820, IT 4820 compatibility: All four models run the same 3.7V single-cell architecture with the same connector pinout and BMS handshake protocol — one battery pack covers the full group without modification.
• Bench tested on actual hardware: We cycled this pack through repeated scan-trigger bursts combined with active wireless polling. The BMS held voltage within spec during combined inrush events and cut off cleanly at the low-voltage threshold without latching.
• First-shift conditioning for IT-series scanners: After installing, place the scanner in its cradle for a full charge cycle before use. Scan trigger inrush is highest when the cell is near minimum charge — a pre-charged pack prevents false BMS trips when the imager fires on the first shift.

Why the IT 1452 loses wireless connection during rapid scan bursts

The IT-series scanners draw from the same cell for both the imager and the wireless radio simultaneously. During fast barcode sequences, the combined inrush can pull the cell voltage below the radio module's minimum operating threshold for a fraction of a second. The BMS reads this as an undervoltage event and briefly suspends output, dropping the wireless link before recovering. A cell at full charge holds voltage higher through these spikes — connection drops during scan bursts almost always point to a degraded or undercharged pack.

Cradle flashing a charging error on a brand-new pack

Charging dock errors on a new pack are usually a contact resistance problem, not a battery fault. The cradle's charging pins read cell voltage through the dock contacts — any oxidation or debris on the pack's contact pads raises resistance enough to confuse the dock's charge controller. Remove the pack, wipe all gold contact pads on the battery and cradle with a dry cloth, reseat firmly, and check that the pack clicks into the dock retention clip. If the error clears within 30 seconds, the contacts were the cause — not the cell.