{"product_id":"harman-kardon-tc30-replacement-battery-37v-950mah-li-ion","title":"Harman Kardon TC30 Remote Replacement Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHarman Kardon TC30 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 950mAh lithium-ion battery for the Harman Kardon TC30 remote control. It replaces a depleted or failed original cell and restores full wireless control of Harman Kardon audio equipment. Dimensions are 53.07 × 33.08 × 7.78mm — confirm these match your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTC30 remote compatibility:\u003c\/strong\u003e\n    The TC30 uses a single-cell 3.7V lithium-ion pack. This replacement matches that voltage rail exactly, ensuring the IR LED circuit receives the correct drive current for consistent signal transmission.\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 bench. The protection circuit handled over-discharge cutoff cleanly, and IR output held steady across the full usable voltage range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell swap note:\u003c\/strong\u003e\n    When fitting this cell, check polarity against the markings in the battery compartment before closing the remote. A reversed install produces no response — not a dead battery, just a backwards one.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TC30 remote stops working immediately after a new battery install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe most common cause is polarity reversal. Lithium-ion cells have a positive terminal and a negative terminal — swap them and the remote draws zero power. The remote shows no response at all, which makes it look like a dead battery rather than a fit error. Open the compartment, check the markings, and reseat the cell with the correct orientation. The remote should respond immediately once the terminals are aligned correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTC30 remote requiring you to point closer and closer to the unit\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe IR LED in the TC30 remote needs a minimum supply voltage to fire with enough power to reach the receiver across a room. As the battery discharges toward its lower threshold — around 3.0V — IR output drops and effective range shrinks. This isn't a fault with the remote itself; it's the cell losing capacity. Replacing the battery restores full IR drive current and normal operating distance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112005210,"sku":"BWCS-LOH880RC-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112037978,"sku":"BWCS-LOH880RC-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112070746,"sku":"BWCS-LOH880RC-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LOH880RC-1.webp?v=1779760313","url":"https:\/\/batteryweb.com\/products\/harman-kardon-tc30-replacement-battery-37v-950mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}