{"product_id":"motorola-moto-edge-s30-replacement-battery-387v-4700mah-li-polymer","title":"Motorola MB50 Replacement Battery 3.87V 4700mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola Moto Edge S30 — 3.87V Li-Polymer Replacement Battery (MB50)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.87V, 4700mAh (18.19Wh) Li-Polymer replacement battery for the Motorola Moto Edge S30, Moto Edge S30 5G (2021), XT2175-2, and Moto G200 5G. It uses OEM part references MB50 and SB18D10749. Swap it when your original cell no longer holds adequate charge through a normal day of use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMoto Edge S30 \/ G200 5G platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — which is why a single cell (MB50) covers the full XT2175 line. Voltage rail sits at 3.87V nominal, matching the power management IC on each board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on an XT2175-2 board. The BMS accepted the cell without error flags, thermal cutoff held within normal thresholds, and the coulomb counter initialised correctly after the first full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC pushes high current into an uncalibrated cell — preventing false percentage readings from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Moto Edge S30\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell's internal impedance climbs high enough that it cannot sustain voltage under the load spike from the modem or display. The phone's power management IC reads a voltage drop it interprets as empty — even though the coulomb counter still shows capacity remaining. The fix is to complete one full discharge cycle after installation so the fuel gauge IC recalibrates its low-voltage cutoff against the new cell. Target a resting voltage above 3.6V before triggering the first full charge cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the charge IC sometimes refuses to negotiate fast-charge protocols until the BMS has completed one standard charge cycle at low current. This is a deliberate safety behaviour — the IC will not push high current into a cell whose impedance profile it has not yet measured. Plug in using the standard charger and allow a full slow charge to complete. On the second cycle, fast charging should activate automatically.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391858212954,"sku":"BWCS-MXT217SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391858245722,"sku":"BWCS-MXT217SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391858278490,"sku":"BWCS-MXT217SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MXT217SL-1.webp?v=1779142368","url":"https:\/\/batteryweb.com\/products\/motorola-moto-edge-s30-replacement-battery-387v-4700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}