Metrologic BA-80S700 MS5500 Compatible Battery 3.7V 750mAh

Metrologic MS5500 / MK5502 Series — 3.7V Li-ion Replacement Battery (BA-80S700)

This 3.7V, 750mAh lithium-ion cell replaces the original BA-80S700 pack in the Metrologic MS5500, MS5500 Optimus S, SP5500, and MK5502 handheld barcode scanners. These are compact imaging scanners used in retail point-of-sale and warehouse inventory workflows. Capacity is rated at 2.78Wh and matches the original cell format exactly.

• MS5500 / MK5502 platform fit: All covered models share the same 3.7V power rail, physical form factor, and BMS handshake protocol — the same cell works across the full scanner family without any modification to the device or firmware.
• Bench tested on actual hardware: We cycled this pack through repeated scan-trigger inrush events on the MS5500 chassis. The BMS held the correct cutoff thresholds at both low-state-of-charge and full-charge conditions with no false trips.
• First-shift preparation for pick-and-pack use: Place the scanner in its cradle for a full charge cycle before putting it into rotation. Scan trigger inrush current peaks when the cell is near minimum, and starting a shift on a pre-charged pack prevents the BMS from tripping on the first heavy burst.

Cradle showing a charging error on a freshly installed pack

Charging docks on the MS5500 family use contact pins that oxidise quickly in warehouse environments. A new pack with clean contacts dropped into a dirty dock can read as an open circuit, triggering a charge fault on the cradle LED. The dock is not detecting the pack — it is detecting the resistance at the contact point. Wipe the battery contacts and dock pins with a dry cloth, reseat the scanner firmly, and the fault clears at contact resistance below roughly 0.5 ohms.

Scanner dropping wireless connection during rapid scan bursts

The MS5500 draws simultaneously from the wireless radio and the imager during a fast scan sequence. When the cell voltage sags under that combined load, the radio module drops its transmission before the imager shuts down — so the scan light stays on but the data never reaches the host. This is a voltage sag issue, not a radio fault. A fully charged pack holds above 3.5V under load and keeps both subsystems stable through burst scanning.