About this replacement
Point Mobile PM550 — 3.7V Li-ion Replacement Battery (550-BTSC)
This is a 3.7V, 5200mAh Li-ion replacement battery for the Point Mobile PM550 handheld barcode scanner. It fits directly into the PM550 used in retail, warehouse, and asset-tracking environments. Part number 550-BTSC matches the OEM pack exactly.
- PM550 fit confirmation: The PM550 uses a single-cell 3.7V architecture with a proprietary latch-and-contact system. This pack matches that connector footprint and carries the same BMS handshake voltage the scanner's charging circuit expects — the device powers on and communicates with the cradle without manual overrides.
- Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the PM550 platform. The BMS held stable across scan trigger bursts and Wi-Fi polling events simultaneously — no false low-voltage cutoffs during combined high-draw moments.
- First-shift prep for pick-and-pack operations: After installing, place the PM550 in its cradle for a full charge cycle before deploying on the floor. The scan trigger inrush current is highest when the cell is near minimum charge — a fully topped pack prevents false BMS trips during the first shift's heavy burst scanning.
Cradle showing a charging error on a new pack
The PM550 cradle checks contact resistance before initiating a charge cycle. If the dock contacts on the battery or cradle have oxidation or debris, resistance reads too high and the cradle flags a fault rather than charging. This is not a faulty battery — it is a contact issue. Wipe the gold contacts on both the pack and the cradle with a dry cloth, reseat the battery firmly, and the charging LED should switch to steady red within 10 seconds.
Scanner dropping wireless connection during rapid scan bursts
During rapid barcode scanning, the PM550 draws simultaneously from the imager, the processor, and the Wi-Fi radio. This combined inrush can cause a momentary voltage sag at the cell terminals if the pack is below roughly 3.5V. The BMS interprets the sag as a low-voltage condition and briefly throttles output, which interrupts the Wi-Fi session. Keep the pack above half charge during high-frequency scanning shifts to stay clear of the sag threshold.