Symbol MC17 Barcode Scanner Replacement Battery BT-000351 3.7V 3350mAh

Symbol MC17 — 3.7V Li-ion Replacement Battery (BT-000351)

This is a 3.7V, 3350mAh (12.4Wh) Li-ion battery for the Symbol MC17 handheld mobile computer. It fits the MC17 used in retail and warehouse environments for barcode scanning and inventory management. OEM cross-references include BTRY-MC17RAB0E-50, BT-000018A01, BTRY-PS20-35MA-01, and BT-000374.

• MC17 platform fit: The MC17 series uses a fixed 3.7V single-cell architecture with a specific BMS handshake through the battery connector. This pack matches that voltage rail and connector pinout so the device authenticates the battery and powers on normally.
• Bench tested on actual hardware: We cycled this pack through the MC17's charge and discharge sequence and monitored the BMS cutoff thresholds under simulated scan-trigger inrush loads. The protection circuit held within expected limits across repeated bursts without nuisance trips.
• First-shift prep on the MC17: After installing, seat the scanner in its cradle for a full charge cycle before starting a pick-and-pack shift. Scan-trigger inrush is highest when the cell is near minimum voltage, and a fully charged pack prevents false BMS trips on that first draw of the day.

Cradle showing charging error on a new MC17 pack

The MC17 cradle reads battery state through the dock contacts on the base of the pack. If those contacts have any film — from handling, packaging residue, or warehouse dust — the cradle can flag a charging fault even though the battery is fine. Wipe the gold contacts on both the pack and the cradle dock with a dry lint-free cloth, then reseat the scanner firmly until you hear the click. The charging indicator should switch to active within 30 seconds.

Scanner losing wireless connection during rapid scan bursts

The MC17 runs both its wireless radio and scan imager off the same cell simultaneously. During rapid scanning sequences, the combined inrush from the scan trigger and the radio polling cycle can cause a momentary voltage sag on a low or aging cell. The BMS interprets a deep sag as an unsafe condition and briefly cuts output, which drops the wireless link. If this happens on a new pack, the cell likely wasn't fully charged before use — place it in the cradle until the charge LED goes green, then retest.