{"product_id":"logitech-ue-boombox-replacement-battery-37v-2800mah-li-ion","title":"Logitech UE Boombox DGYF001 Replacement Battery 3.7V 2800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLogitech UE Boombox — 3.7V Li-ion Replacement Battery (DGYF001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2800mAh Li-ion cell that replaces the original battery in the Logitech UE Boombox portable Bluetooth speaker. It fits the UE Boombox (984-000304) and uses OEM part numbers DGYF001, GPRLO18SY002, and 533-000096. Swap it when the original cell no longer holds enough charge to keep the speaker running away from a power source.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUE Boombox (984-000304) fitment:\u003c\/strong\u003e\n    The UE Boombox uses a single Li-ion cell at 3.7V to power both the amplifier board and the Bluetooth radio. This cell matches the original connector pinout and physical dimensions (65.92 × 21.70 × 19.65mm), so the BMS handshake between the cell and the speaker's charge controller runs without modification.\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 UE Boombox platform. The BMS accepted charge from the factory charger without fault, and the protection circuit tripped correctly at low-voltage threshold before the cell reached unsafe depth of discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eShallow-cycle management on the UE Boombox:\u003c\/strong\u003e\n    Because this speaker often sits on a desk and gets topped off constantly, let the cell drain below 20% at least once a month before recharging. Continuous partial charging without a full discharge cycle causes fuel gauge drift, making the indicator read full when actual capacity has already dropped.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the UE Boombox cuts out at high volume even on a fresh charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt high volume, the amplifier and Bluetooth radio draw current simultaneously, creating a combined spike the cell must deliver instantly. If the cell's internal resistance has climbed — either from age or deep-discharge damage — voltage sags under that peak load and the BMS interprets it as a critically low cell. The speaker cuts audio to protect the circuit before the fuel gauge shows empty. A new cell with lower internal resistance handles the combined amp-plus-radio draw without triggering that cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distorts before the battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a degraded cell can no longer hold voltage steady under amplifier load, output voltage sags into the range where the amp clips — this shows up as distortion before the indicator reaches the low-battery warning. The cell still has charge by the gauge's reading, but it cannot deliver clean current at the rate the amplifier demands. This is voltage sag, not a software or speaker fault. Replacing the cell restores stable voltage delivery; confirm the new cell reads above 3.6V under load during initial charge to verify the BMS is tracking correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416236785754,"sku":"BWCS-LOE984RX-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416236818522,"sku":"BWCS-LOE984RX-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416236851290,"sku":"BWCS-LOE984RX-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LOE984RX-1.webp?v=1779761074","url":"https:\/\/batteryweb.com\/products\/logitech-ue-boombox-replacement-battery-37v-2800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}