{"product_id":"sony-mdr-ds7500-replacement-battery-37v-1200mah-li-polymer","title":"Sony MDR-DS7500 Replacement Battery LIS1410 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony MDR-DS7500 — 3.7V Li-Polymer Replacement Battery (LIS1410)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1200mAh Li-Polymer cell replaces the original LIS1410 battery in the Sony MDR-DS7500 wireless headset. The MDR-DS7500 is a closed-ear home audio headset that streams audio wirelessly from a base station. When the original cell degrades and the headset stops holding charge, this replacement restores full wireless operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMDR-DS7500 fit:\u003c\/strong\u003e\n    The LIS1410 is the sole cell format used in this headset. The slim 51.40 x 34.50 x 6.00mm Li-Polymer pouch matches the housing geometry and connects directly to the headset's internal BMS. No adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the MDR-DS7500's charge circuit. The BMS accepted the new pack, completed a full charge sequence without error flags, and held a stable 3.7V nominal rail under combined audio and RF transmitter draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use cycle on the MDR-DS7500:\u003c\/strong\u003e\n    Place the headset in the base station and let it complete one full uninterrupted charge before use. The 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\"\u003eWhy the MDR-DS7500 cuts out mid-listen on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MDR-DS7500 draws current from two loads simultaneously — the audio amplifier and the DECT radio transmitter. Under that combined draw, a cell that arrived at storage voltage (around 3.6V) can sag below the BMS cutoff threshold momentarily, triggering a shutdown. This is not a faulty battery. Place the headset back on the base, allow it to charge fully to 4.2V, and the cutouts stop after the first complete cycle normalises the cell's internal resistance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows full charge but headset dies quickly after first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at partial storage voltage — typically 3.6–3.7V — not a full 4.2V charge. The base station's charge indicator can read \"full\" prematurely if the handshake completes before the cell reaches true capacity. The fix is straightforward: leave the headset docked for a complete charge cycle of several hours without interruption. After that first full cycle, charge time and talk time will both normalise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428114464858,"sku":"BWCS-SDR750SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428114497626,"sku":"BWCS-SDR750SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428114530394,"sku":"BWCS-SDR750SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDR750SL-1.webp?v=1779934190","url":"https:\/\/batteryweb.com\/products\/sony-mdr-ds7500-replacement-battery-37v-1200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}