{"product_id":"jbl-pulse-4-replacement-battery-37v-7800mah-li-ion","title":"JBL Pulse 4 Replacement Battery 3.7V 7800mAh SUN-INTE-168","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Pulse 4 — 3.7V Li-ion Replacement Battery (SUN-INTE-168)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 7800mAh (28.86Wh) Li-ion replacement battery for the JBL Pulse 4 portable Bluetooth speaker. It restores power to the speaker's audio amplifier, Bluetooth radio, and LED light ring. Fit is confirmed against OEM part numbers SUN-INTE-168 and DH03073CHM.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePulse 4 compatibility:\u003c\/strong\u003e\n    The Pulse 4 runs a single-cell 3.7V pack that powers both the Class D amplifier and the LED sync circuit from the same voltage rail. This cell matches that rail and the connector pinout used by the Pulse 4's charge management IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the Pulse 4's onboard BMS and confirmed the protection circuit trips correctly on overcurrent and that the fuel gauge registers capacity accurately across charge states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDischarge cycling for the Pulse 4:\u003c\/strong\u003e\n    The Pulse 4 is typically kept on a desk and topped off constantly. Let the battery drop below 20% at least once a month before recharging — skipping this causes fuel gauge drift and accelerates cell capacity fade.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pulse 4 LED ring flickers under heavy bass at high volume\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LED ring and amplifier share the same battery rail. At high volume with heavy bass, the amplifier pulls sharp current spikes. If the cell's internal resistance is elevated — common in aged packs — voltage on the shared rail briefly sags. The LED controller reads that sag as a low-power event and dims or flickers the ring. A fresh cell with lower internal resistance holds the rail steady under those spikes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePulse 4 not waking from USB-C charge after sitting unused for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells left fully discharged for extended periods drop below the minimum voltage USB-C PD chargers will accept — typically around 2.5V per cell. The Pulse 4's BMS blocks charge input at that level to protect the cell, so the speaker appears completely dead. Some packs recover with a trickle charge applied directly, but if the cell has sat below 2.5V for weeks, recovery is unlikely. Prevent this by storing the speaker at 40–60% charge if it won't be used for more than a few weeks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416210964570,"sku":"BWCS-JMP400SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416210997338,"sku":"BWCS-JMP400SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416211030106,"sku":"BWCS-JMP400SL-3","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JMP400SL-1.webp?v=1779760921","url":"https:\/\/batteryweb.com\/products\/jbl-pulse-4-replacement-battery-37v-7800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}