{"product_id":"logitech-880-000248-replacement-battery-37v-1100mah-li-polymer","title":"Logitech UE Boombox 533-000108 Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLogitech UE Mini Boombox — 3.7V Li-Polymer Replacement Battery (533-000108)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1100mAh Li-Polymer battery replaces the original cell in the Logitech UE Mobile Boombox and Mini Boombox series, including models 880-000248, 886-000015, and S-000136. It fits the slim internal bay and connects to the same BMS circuit the original cell uses. Capacity comes from the product specification at 4.07Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMobile Boombox and Mini Boombox series fit:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, connector pinout, and BMS handshake, so one replacement cell covers the full platform.\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 UE Mobile Boombox unit. The BMS accepted the cell without fault codes, balanced normally at full charge, and held the protection thresholds at both ends of the voltage window.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle for Boombox users:\u003c\/strong\u003e\n    Because this speaker often sits on a desk charging between short sessions, the fuel gauge drifts when the cell never fully discharges. Let the speaker play down past 20% at least once a month before reconnecting the charger — this recalibrates the gauge and slows capacity fade on the Li-Polymer cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio cutting out at high volume on a freshly charged Boombox\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAt high volume, the amplifier pulls a sharp current spike on top of the Bluetooth radio draw. If the cell has any internal resistance — from age or a prior deep discharge — the combined load drags the cell voltage below the BMS low-voltage threshold momentarily. The BMS trips the output to protect the cell, and audio cuts. A new cell with lower internal resistance handles the combined amp-plus-radio draw without the sag that trips protection. If it still cuts at high volume after fitting the new cell, check that the connector is fully seated — a loose pin adds contact resistance that mimics a degraded cell under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSpeaker won't wake from USB charge after sitting unused for weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge slowly in storage. If the Boombox sits unpowered long enough, the cell drops below the minimum voltage the USB charging circuit will accept — typically under 2.5V. At that point the charger sees no handshake and does nothing. Apply a constant 5V USB source and leave it connected for at least 20–30 minutes without interruption; the protection circuit needs a sustained trickle to pull the cell back above the acceptance threshold before normal charging can begin. If the indicator still shows no activity after 45 minutes, the cell has over-discharged past recovery and needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416187109466,"sku":"BWCS-LOE248SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416187142234,"sku":"BWCS-LOE248SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416187175002,"sku":"BWCS-LOE248SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LOE248SL-1.webp?v=1779760648","url":"https:\/\/batteryweb.com\/products\/logitech-880-000248-replacement-battery-37v-1100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}