{"product_id":"harmankardon-onyx-studio-4-replacement-battery-37v-3000mah-li-ion","title":"ICR22650 Harman\/Kardon Onyx Studio 4 Replacement Battery 3.7V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHarman\/Kardon Onyx Studio 4 — 3.7V Li-ion Replacement Battery (ICR22650)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 3000mAh Li-ion cell for the Harman\/Kardon Onyx Studio 4 portable Bluetooth speaker. It replaces the original ICR22650 format cell when the pack no longer holds a useful charge or fails to power the speaker at all. Fits both the Onyx Studio 4 and Onyx 4 variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOnyx Studio 4 and Onyx 4 compatibility:\u003c\/strong\u003e\n    Both models use the same ICR22650 cylindrical cell, share the same 3.7V nominal voltage rail, and draw from the same connector layout on the charging board — one cell fits both without modification.\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 the Onyx Studio 4 platform. The BMS accepted the cell without error, balanced correctly at 4.2V full charge, and held the protection cutoff at the expected low-voltage threshold under amplifier load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle for the Onyx 4:\u003c\/strong\u003e\n    This speaker gets topped off constantly on desks and shelves. Let the battery drop below 20% at least once a month before recharging — skipping full discharge cycles causes fuel gauge drift and speeds up capacity fade on the ICR22650 cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distorting before the battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAs the ICR22650 cell ages, its internal resistance rises. Under high amplifier load, the cell voltage sags below what the amp needs even though the fuel gauge still reads 20–30%. The amplifier clips because it cannot draw enough clean current, and distortion appears well before the low-battery warning fires. Replacing the cell restores the voltage floor and eliminates the sag that causes early clipping.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSpeaker won't wake from USB-C after sitting unused for weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA deeply discharged ICR22650 cell can drop below the minimum acceptance voltage for USB-C PD negotiation — typically under 2.5V. At that level, the charger handshake fails and the speaker appears completely dead rather than charging. To recover, connect to a 5V USB-A charger instead of USB-C, which bypasses PD negotiation and trickle-charges the cell back above the 2.7V reinitialisation threshold before switching to normal charge rate.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416220860506,"sku":"BWCS-HKE400SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416220893274,"sku":"BWCS-HKE400SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416220926042,"sku":"BWCS-HKE400SL-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HKE400SL-1.webp?v=1779760990","url":"https:\/\/batteryweb.com\/products\/harmankardon-onyx-studio-4-replacement-battery-37v-3000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}