Point Mobile PM451 Barcode Scanner Replacement Battery 451-BTSC 3.7V 4000mAh

Point Mobile PM451 / PM452 — 3.7V Li-Polymer Replacement Battery (451-BTSC)

This 3.7V, 4000mAh Li-Polymer battery replaces the original pack in the Point Mobile PM451 and PM452 handheld barcode scanners. It matches the OEM voltage rail and connector, so the device powers on and communicates with the dock without reconfiguration. Rated at 14.8Wh, capacity is drawn from product specifications — not estimated.

• PM451 and PM452 platform fit: Both models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The cell dimensions — 81.40 × 44.20 × 17.20mm — seat flush in either chassis with no adapter required.
• Bench tested on actual hardware: We cycled this pack through repeated scan-burst sequences and wireless polling loads. The BMS held voltage within the expected window under combined radio and imager draw, with no false low-voltage cutoffs during stress testing.
• First-shift preparation for pick-and-pack use: After installing, place the scanner in its cradle for a full charge cycle before running it on the floor. Scan trigger inrush current is highest when the cell is near minimum — a fully charged cell prevents BMS trips on the first shift when scan frequency is high.

Cradle showing a charging error on a new pack

Dock charging errors on a freshly installed battery almost always trace to contact resistance at the battery terminals, not a fault in the cell itself. Warehouse handling leaves oils, dust, and oxidation on both the pack contacts and the cradle pins. A high-resistance connection confuses the dock's charge controller, which reads it as a faulty or incompatible pack. Wipe the battery contacts and cradle pins with a dry lint-free cloth, reseat the pack firmly, and the error clears in most cases — the dock should then begin the normal charge cycle within 30 seconds.

Scanner losing wireless connection during rapid scan bursts

During a fast scan sequence, the PM451 draws simultaneously from the imager and the wireless radio — both pull current at the same moment. If the cell voltage sags below the radio module's minimum operating threshold during that combined inrush, the wireless stack drops and the scanner loses its connection to the host system. This is more likely when the battery is below 20% charge, because internal resistance rises as the cell discharges. Keep the pack above 20% during high-frequency scan shifts, or rotate to a charged spare when the device indicator shows one bar remaining.