Zebra MC20 Barcode Scanner Compatible Battery 3.7V 3300mAh

Zebra MC20 — 3.7V Li-ion Replacement Battery (BT-000450)

This 3.7V, 3300mAh lithium-ion battery replaces the original pack in the Zebra MC20 mobile computer. The MC20 is a handheld barcode scanner used in retail, warehousing, and logistics environments. It drops directly into the battery bay and connects via the same multi-pin dock interface as the OEM unit.

• MC20 platform fit: The MC20 uses a single-cell Li-ion architecture at 3.7V nominal. The BMS handshake operates over a dedicated sense line in the connector — this pack carries the same resistor ID the dock and device firmware expect, so the charge controller accepts it without fault codes.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the MC20 platform. The BMS held voltage within spec across scan trigger and wireless radio draw combined, with no mid-cycle cutoff events recorded.
• First-shift prep on the MC20: After installing, seat the scanner in its cradle for a complete charge cycle before starting pick-and-pack. The scan trigger inrush current spikes hardest when the cell is near minimum — a fully charged pack prevents the BMS from tripping on the first burst of the shift.

Cradle showing a charging error on a new pack

The MC20 cradle reads pack identity through the contact array on the battery face. If the dock contacts are oxidised or the pack is seated at a slight angle, contact resistance rises high enough that the charger IC logs a fault rather than initiating a charge cycle. Wipe the gold contacts on both the pack and the cradle with a dry cloth, then firmly reseat the scanner until you feel the retention click. The charge LED should shift from fault amber to solid green within a few seconds of clean contact.

Scanner losing wireless connection during rapid scan bursts

The MC20 pulls current simultaneously from the imaging engine and the wireless radio during a rapid scan sequence. If the cell voltage sags below the radio module's minimum threshold — typically around 3.2V under combined load — the wireless stack drops before the BMS triggers a full cutoff. This causes the scanner to lose its pairing mid-burst while the imager still fires. A full charge before the shift keeps the cell well above that sag threshold; if drops persist on a charged pack, check that no other process is polling the radio at an elevated rate in the device config.