Symbol MC9500 Barcode Scanner Replacement Battery 3.7V 6800mAh

Symbol MC9500 / MC9590 / MC9596 — 3.7V Li-ion Replacement Battery (BTRY-MC95IABA0)

This 3.7V Li-ion battery delivers 6800mAh (25.16Wh) for the Symbol MC9500, MC9590, and MC9596 handheld mobile computers. It replaces OEM part numbers BTRY-MC95IABA0 and 82-111636-01. These scanners run continuous pick-and-pack, asset tracking, and POS workflows — this pack is built to keep up with shift-length demand.

• MC9500 / MC9590 / MC9596 platform fit: All three models share the same battery bay geometry, contact layout, and BMS handshake protocol. A single pack covers the entire MC95 family. The BMS communicates state-of-charge data to the device OS, so battery percentage readings display correctly on all three models without recalibration.
• Bench tested on actual hardware: We ran this pack through charge-discharge cycles on an MC9500 unit, monitoring BMS communication, contact voltage, and scan-trigger inrush response. The BMS held stable across rapid scan bursts combined with active 802.11 wireless polling — the two highest simultaneous draw events on this platform.
• First-shift cradle cycle: After installing a new pack, seat the scanner in its cradle and run a full charge cycle before the first shift. The scan trigger draws its highest inrush current when the cell is near minimum charge. Starting the first shift on a fully charged cell prevents the BMS from tripping on that initial peak draw.

Cradle showing a charging error on a new pack

The MC95 cradle reads battery state through gold pogo-pin contacts on the pack base. If those contacts have oxidation, residue from packaging, or debris from warehouse use, the cradle throws a charging fault even though the pack itself is fine. The dock interprets high contact resistance as a communication failure, not a dirty connection. Wipe the pack contacts and cradle pins with a dry cloth, reseat the pack firmly, and the charge indicator should return to green within 30 seconds.

Scanner losing wireless connection during rapid scan bursts

On the MC9500, the 802.11 radio and scan trigger fire simultaneously during fast barcode capture — that combined inrush can pull the cell voltage below the BMS minimum threshold for a split second. When it does, the BMS briefly interrupts output, the radio drops its access point association, and the scanner stalls mid-batch. This is most common when the battery is below 20% charge. Keep the pack above 3.5V per cell during high-frequency scan operations to avoid the BMS cutoff triggering on combined radio and imager load.