{"product_id":"sony-mdr-xb950n1-replacement-battery-37v-1000mah-li-polymer","title":"Sony MDR-XB950N1 Replacement Battery 3.7V 1000mAh LIS1553","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony MDR-XB950N1 \/ WH-CH700N \/ SRS-WS1 — 3.7V Li-Polymer Replacement Battery (LIS1553)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-Polymer replacement cell for the Sony MDR-XB950N1, WH-CH700N, and SRS-WS1. It replaces OEM part LIS1553 (also listed as A-2215-026-A and LIS1553HNPCS). Fit this battery when the original cell no longer holds a charge, cutting out active noise cancellation or dropping wireless audio mid-use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMDR-XB950N1, WH-CH700N, and SRS-WS1 compatibility:\u003c\/strong\u003e\n    All three models share the LIS1553 cell format — same 3.7V nominal rail, same connector pinout, and the same BMS handshake protocol used by Sony's onboard charge controller. Swapping the cell does not require firmware changes or pairing resets.\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 MDR-XB950N1 unit. The BMS accepted the new cell without error flags, completed a full charge cycle, and noise cancellation drew correctly without triggering undervoltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charge protocol for the MDR-XB950N1:\u003c\/strong\u003e\n    Place the headset on charge from flat before the first listening session. The onboard controller uses the initial charge cycle to calibrate the fuel gauge — skip this and the battery indicator will misread state-of-charge for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MDR-XB950N1 cuts out when ANC and audio run together\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eActive noise cancellation and Bluetooth audio draw simultaneously from the same cell. On a degraded battery, the combined current pull drops cell voltage below the BMS cutoff threshold — the headset shuts off even though the indicator showed charge remaining. A fresh LIS1553 cell raises the usable voltage floor, keeping the combined draw above cutoff. If the new cell still cuts out, check that the first full charge cycle was completed — a cell that has never been fully charged will hit its floor earlier than rated.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than expected on the first few uses\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — roughly 3.85V — not at full capacity. The onboard fuel gauge on the WH-CH700N and MDR-XB950N1 reads this as a partial charge and estimates talk time accordingly. Real capacity increases over the first three to five full charge-discharge cycles as the cell's electrolyte stabilises. Run three complete cycles — charge to full, use until the headset shuts off — before treating the talk-time indicator as accurate.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428123410522,"sku":"BWCS-SXB950SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428123443290,"sku":"BWCS-SXB950SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428123476058,"sku":"BWCS-SXB950SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SXB950SL-1.webp?v=1779761021","url":"https:\/\/batteryweb.com\/products\/sony-mdr-xb950n1-replacement-battery-37v-1000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}