{"product_id":"corsair-hs75-xb-replacement-battery-37v-1500mah-li-polymer","title":"Corsair HS75 XB Wireless Headset Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCorsair HS75 XB — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh (5.55Wh) lithium-polymer battery for the Corsair HS75 XB wireless headset. It fits the HS75 XB only — do not attempt to use it in other Corsair headset models. Swap it when your original cell no longer holds a charge or the headset cuts off well before the rated talk time.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHS75 XB fit:\u003c\/strong\u003e\n    The HS75 XB uses a compact Li-Polymer cell with a specific connector orientation and BMS handshake tied to the Corsair wireless charging circuit. This replacement matches those electrical requirements so the base station reads the pack correctly and charging resumes normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the HS75 XB base station and confirmed the BMS completed its handshake on the first dock. The charge indicator progressed through its normal cycle without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle protocol for the HS75 XB:\u003c\/strong\u003e\n    Place the headset in the base station and let it complete one full uninterrupted charge cycle before use. The HS75 XB base needs to log the new cell before its talk-time estimate becomes accurate — taking a call partway through that first cycle will skew the indicator for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the HS75 XB cuts out mid-call on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HS75 XB draws simultaneously from its audio driver and its 2.4GHz wireless radio. Under that combined load, a cell at storage voltage — typically around 3.6V — can sag below the BMS cutoff threshold even though the headset showed a healthy charge indicator. The BMS interprets that voltage sag as a depleted cell and shuts the headset down to protect the pack. This is not a fault with the replacement cell. One full charge cycle from the base station brings the cell to operating voltage and the sag on radio transmit drops to within tolerance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows charging error after fitting the new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eIf the base station flashes an error or the charge LED does not progress after seating the new battery, the BMS handshake has not completed. Remove the headset, leave it off the base for 30 seconds, then re-seat it firmly — the connector needs full contact for the handshake to initiate. If the error persists, check that the headset's power switch is in the ON position; some HS75 XB units will not complete the BMS negotiation with the switch off. A successful handshake shows as a steady or slowly pulsing charge indicator within 60 seconds of docking.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428104634458,"sku":"BWCS-HPX456SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428104667226,"sku":"BWCS-HPX456SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428104699994,"sku":"BWCS-HPX456SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPX456SL-1.webp?v=1779934117","url":"https:\/\/batteryweb.com\/products\/corsair-hs75-xb-replacement-battery-37v-1500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}