{"product_id":"jbl-t450bt-replacement-battery-37v-180mah-li-polymer","title":"JBL T450BT Replacement Battery 3.7V 180mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL T450BT — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 180mAh Li-Polymer cell replaces the original battery in JBL T450BT wireless on-ear headphones. It fits the T450BT's compact internal bay and restores power to the Bluetooth radio and audio circuit. Dimensions are 30.00 × 20.00 × 4.00mm — measure your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT450BT platform fit:\u003c\/strong\u003e\n    The T450BT uses a small Li-Polymer pouch cell on a low-current audio and Bluetooth circuit. This cell matches the voltage rail and physical footprint that headphone's PCB expects. No BMS handshake is required — the protection circuit is built into the cell itself.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on the T450BT platform and confirmed the onboard protection circuit triggers correctly at low-voltage cutoff. Charge acceptance was consistent across cycles with no thermal anomalies noted.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eConnector orientation on the T450BT:\u003c\/strong\u003e\n    The T450BT's internal JST-style connector is short and sits close to the PCB edge. Seat the plug straight — angled insertion can bend the pins and cause an intermittent power fault that looks like a dead battery rather than a connector issue.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the T450BT shows full charge but cuts out early\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe T450BT's fuel gauge reads voltage, not true cell capacity. After the original cell degrades, the voltage curve flattens and the headphones interpret a near-depleted cell as mostly full until voltage drops sharply. When you fit a fresh 180mAh cell, the voltage curve returns to normal shape. The indicator will then track charge level accurately again. If cut-outs persist after fitting this cell, check that the connector is fully seated — partial contact causes voltage drop under load that the headphones read as a dying cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eT450BT not powering on after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly shipped Li-Polymer pouch cell may arrive at a storage charge of around 3.6V — just below the T450BT's minimum startup threshold. The headphones may appear completely dead even though the cell is fine. Connect to a USB charger immediately after fitting and leave it for 15–20 minutes before attempting to power on. If the LED still does not respond, press and hold the power button for 10 seconds to clear the protection latch, then reconnect the charger and confirm voltage reads at least 3.7V before powering on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377716985946,"sku":"BWCS-BT001SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377717018714,"sku":"BWCS-BT001SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377717051482,"sku":"BWCS-BT001SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BT001SL-1.webp?v=1778771838","url":"https:\/\/batteryweb.com\/products\/jbl-t450bt-replacement-battery-37v-180mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}