{"product_id":"symbol-replacement-battery-37v-4400mah-li-ion","title":"Symbol 82-127909-02 Barcode Scanner Replacement Battery 3.7V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSymbol MC31 Series — 3.7V Li-ion Replacement Battery (82-127909-02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion battery rated at 4400mAh (16.28Wh), built to fit Symbol MC31-series handheld barcode scanners. These scanners run in retail, warehouse, and logistics environments where continuous scanning across full shifts is the norm. The OEM part numbers covered include 82-127909-02, BTRY-MC31KAB02, BTRY-MC31KAB02-50, and BTRY-MC3XKABOE.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMC31 series platform fit:\u003c\/strong\u003e\n    The MC31 line shares a common battery bay, connector pinout, and BMS handshake protocol across its variants. This pack communicates state-of-charge data back to the host device over the same data line as the original — the scanner's charge indicator and battery status screen behave normally after installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on MC31 hardware. The BMS handled scan-trigger inrush without tripping, and the protection circuit responded correctly to both over-voltage and under-voltage thresholds during load testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-shift install tip:\u003c\/strong\u003e\n    After dropping this pack in, seat the scanner in its cradle and let it complete a full charge cycle before the first pick-and-pack shift. Scan-trigger inrush is highest when the cell is near minimum charge — a fully topped cell prevents false BMS cutoff events during the first hour of use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCradle showing charging error on a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCharging docks on MC31 cradles read pack state through the contact array on the battery's base. If those contacts have any oxidation, residue from handling, or misalignment from a partial seat, the dock throws a charging fault rather than starting the charge cycle. Wipe the contacts on both the battery and the cradle slot with a dry cloth, then press the pack firmly until it clicks into the bay. If the error clears, the connection was the issue — not the pack itself. A correctly seated pack should register on the cradle within 10 seconds.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eScanner dropping wireless connection during rapid scan bursts\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MC31 draws simultaneously from the wireless radio and the scan trigger during rapid burst scanning. At low state-of-charge, this combined inrush can cause a momentary voltage sag that the BMS interprets as a load fault, briefly cutting power to the radio module. The result looks like a Wi-Fi dropout or connection reset mid-scan, not a battery error. Keep the pack above 20% charge during high-frequency scanning shifts — the sag margin at that level is sufficient to carry both loads without triggering the protection circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43324906012762,"sku":"BWCS-MC310BX-1","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43324906045530,"sku":"BWCS-MC310BX-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43324906078298,"sku":"BWCS-MC310BX-3","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MC310BX-1.webp?v=1778123334","url":"https:\/\/batteryweb.com\/products\/symbol-replacement-battery-37v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}