{"product_id":"swisstone-bx200-replacement-battery-37v-1200mah-li-ion","title":"Swisstone BX200 Replacement Battery 3.7V 1200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSwisstone BX200 — 3.7V Li-ion Replacement Battery (HY433450R)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the HY433450R Li-ion cell for the Swisstone BX200 portable Bluetooth speaker. It runs at 3.7V with a 1200mAh (4.44Wh) capacity. Fit the BX200 only — confirm the part number on your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBX200 fit:\u003c\/strong\u003e\n    The BX200 uses a single-cell 3.7V Li-ion pack with a compact 53.10 x 34.20 x 6.50mm footprint. The HY433450R matches that cell geometry, voltage rail, and connector orientation so the BMS handshake clears on first boot.\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 a BX200 unit. The BMS accepted the pack without error flags, audio output held steady through the charge curve, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle for the BX200:\u003c\/strong\u003e\n    The BX200 spends most of its life plugged in or topped off between short sessions. Let the battery run below 20% at least once a month before recharging — constant shallow top-off without a full discharge causes fuel gauge drift, and the charge indicator becomes unreliable faster than the cell itself degrades.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distortion before the BX200 battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAs the cell discharges toward its lower voltage threshold, the amplifier inside the BX200 loses the headroom it needs to reproduce audio cleanly. The result is clipping — a harsh, crackling distortion — while the LED indicator still shows charge remaining. This happens because the fuel gauge is reading a voltage curve, not actual remaining capacity, and an aged or drifted cell sags faster under amplifier load than the indicator predicts. A fresh HY433450R cell with a consistent voltage curve eliminates most of this sag. If distortion still appears early after fitting a new cell, run two full discharge-recharge cycles to let the BMS recalibrate its gauge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBX200 not waking from USB charge after sitting unused for weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA deeply discharged Li-ion cell can drop below the minimum acceptance voltage that USB charging circuits expect — typically around 2.5V — and the charger simply sees no valid pack to negotiate with. The BX200 will appear completely dead even with a cable connected. Try a different USB power source rated at 5V\/1A or higher, and hold the charge cable in place for 10–15 minutes before pressing the power button — some BMS circuits need a slow trickle before they accept a full charge handshake. If the cell has been stored discharged for more than three months, it may be below recoverable voltage and the cell itself needs replacing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416196677722,"sku":"BWCS-SBX200SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416196710490,"sku":"BWCS-SBX200SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416196743258,"sku":"BWCS-SBX200SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBX200SL-1.webp?v=1779760792","url":"https:\/\/batteryweb.com\/products\/swisstone-bx200-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}