About this replacement
Symbol MC3000 / MC3090 Series — 3.7V Li-ion Replacement Battery (55-060112-86)
This 3.7V, 4400mAh Li-ion battery replaces the depleted pack in Symbol MC30, MC3000, MC3070, and MC3090 series handheld barcode scanners. It matches the original cell format, voltage rail, and BMS handshake so the host device recognises the pack on first insertion. Capacity is sourced from the product specification — 4400mAh / 16.28Wh.
- MC30 / MC3000 / MC3070 / MC3090 platform fit: All four model lines share the same 3.7V battery bay, contact pinout, and BMS communication protocol. One pack covers the full family without adapter changes or firmware flags.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on an MC3090 unit. The BMS reported state-of-charge correctly in the device menu, and the charge cradle accepted the pack without fault codes on every test cycle.
- First-shift cradle cycle: After installing the new pack, seat the scanner in its cradle for a full charge cycle before pulling it into active picking. Scan trigger inrush current is highest when the cell is near minimum charge — a fully conditioned cell prevents false BMS trips on the first shift.
Cradle showing a charging error on a freshly installed pack
MC-series cradles use contact resistance to verify pack seating before starting a charge cycle. Oxidation or debris on the battery's gold contacts raises that resistance above the dock's threshold, and the cradle flags a fault instead of charging. Remove the pack, wipe the contacts on both the battery and the cradle bay with a dry cloth, then reseat firmly. If the fault clears, the contact surface was the issue — not the pack or the dock.
Scanner losing wireless connection during a rapid scan burst
When the MC3090 fires the scan trigger repeatedly in quick succession, the combined draw from the imager and the 802.11 radio can spike the load on a low-charge cell. Voltage sags briefly below the radio module's operating floor, and the wireless link drops before the BMS trips the pack. This is not a defective battery — it is a cell-state issue. Charge the pack to at least 3.9V before the shift starts, and the voltage headroom will absorb the combined inrush without dropping the wireless session.