{"product_id":"microsoft-tll-00002-replacement-battery-38v-1000mah-li-polymer","title":"Microsoft TLL-00002 Replacement Battery 3.8V 1000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMicrosoft TLL-00002 — 3.8V Li-Polymer Replacement Battery (MCOWX11)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 1000mAh Li-Polymer cell replaces the original battery in the Microsoft TLL-00002 wireless headset. It restores power to the headset's DECT radio and audio circuits when the original cell no longer holds a usable charge. Dimensions are 43.60 × 27.50 × 5.70mm — confirm these against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTLL-00002 fit:\u003c\/strong\u003e\n    This pack matches the voltage rail, connector, and BMS handshake required by the TLL-00002. The DECT radio and audio amplifier draw simultaneously, so the cell must satisfy both loads without tripping the protection circuit — this one does.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the pack through combined DECT transmission and audio load. The BMS held steady across the draw spike at connection, and the protection circuit did not trip under sustained dual-load conditions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Place the headset in its base station and run a complete charge cycle before taking any calls. The TLL-00002 base station logs the new cell during that first cycle — until it does, the talk-time indicator will read inaccurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising the new pack after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TLL-00002 base station communicates with the battery's BMS before registering a charge state. If the new cell arrives at storage voltage — typically around 3.6V — the base may show no charge activity or a blinking error light. This is not a fault with the cell. Seat the headset firmly in the cradle and leave it undisturbed for at least one full charge cycle. After that cycle completes, the base station handshake resets and the charge indicator should read normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated on the first few uses\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells don't deliver full rated capacity straight out of the packaging. On the first two or three cycles, the electrochemical layers haven't fully activated, so available capacity runs noticeably short. This is expected behaviour, not a defective cell. Run three to five full charge-and-discharge cycles through normal headset use and rated capacity will stabilise — no special conditioning steps are needed beyond regular use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428099588186,"sku":"BWCS-MHT002SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428099620954,"sku":"BWCS-MHT002SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428099653722,"sku":"BWCS-MHT002SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MHT002SL-1.webp?v=1779934086","url":"https:\/\/batteryweb.com\/products\/microsoft-tll-00002-replacement-battery-38v-1000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}