{"product_id":"philips-gogear-muse-replacement-battery-37v-1400mah-li-polymer","title":"Philips GoGear Muse BA504457SP Replacement Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips GoGear Muse — 3.7V Li-Polymer Replacement Battery (BA504457SP)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1400mAh lithium-polymer cell replaces the BA504457SP battery in the Philips GoGear Muse portable media player. It fits models SA2MUS16S\/02 and SA3MUS08S\/37. Dimensions are 56.45 × 44.10 × 5.00mm — measure your original cell before ordering if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGoGear Muse SA2 and SA3 compatibility:\u003c\/strong\u003e\n    Both SA2MUS16S\/02 and SA3MUS08S\/37 variants use the same BA504457SP cell with identical voltage rail, connector pinout, and BMS handshake. One cell covers the full Muse range listed above.\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 GoGear Muse unit. The BMS accepted the cell without fault flags, and the charge circuit ramped current normally through CC and CV phases.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol for the GoGear Muse:\u003c\/strong\u003e\n    After fitting a new cell, connect the Muse to its charger before powering it on. Media players in this class often enter deep-discharge protection during long storage. A 30-minute trickle from the charger clears that state before the device accepts full current.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping after a cell swap on the GoGear Muse\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GoGear Muse reads battery level by comparing cell voltage against fixed thresholds in firmware. A brand-new cell has a slightly different voltage curve than the aged cell it replaced, so the indicator recalibrates over the first few charge cycles. You may see the percentage jump from 80% to 100% or drop suddenly near the end. Run two or three full charge-to-discharge cycles and the readings stabilise as the firmware maps the new cell's curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cutting out before the battery indicator shows empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe audio amplifier inside the Muse draws a brief current spike every time it drives headphone output at higher volumes. Near end-of-charge, the cell voltage sags under that spike and can briefly dip below the BMS cutoff threshold — killing playback even though the indicator still shows charge remaining. This is a voltage-sag issue, not a capacity issue. If playback cuts at moderate volume near end of charge, reduce output volume by 20–30% to lower amplifier draw and get the cell past that sag point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381335326810,"sku":"BWCS-PS083SL-1","price":12.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381335359578,"sku":"BWCS-PS083SL-2","price":13.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381335392346,"sku":"BWCS-PS083SL-3","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PS083SL-1.webp?v=1778900029","url":"https:\/\/batteryweb.com\/products\/philips-gogear-muse-replacement-battery-37v-1400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}