{"product_id":"jbl-pulse-1-replacement-battery-37v-3000mah-li-polymer","title":"JBL Pulse 1 Replacement Battery 3.7V 3000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Pulse 1 — 3.7V Li-Polymer Replacement Battery (DS144112056)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 3000mAh Li-Polymer replacement battery for the JBL Pulse 1 portable Bluetooth speaker. It fits the original battery slot and restores both wireless audio playback and the LED light ring. Use OEM part number DS144112056 or MLP822199-2P to verify you have the right cell before opening the unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePulse 1 compatibility:\u003c\/strong\u003e\n    The Pulse 1 runs a single-cell Li-Polymer pack at 3.7V nominal, shared between the amplifier board, Bluetooth radio, and LED driver. Any replacement must match that voltage rail exactly — a cell even slightly out of spec will cause the BMS to flag a fault and cut output before the LEDs finish cycling through startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Pulse 1's combined amp-and-LED load at full brightness and high volume. The BMS held charge termination cleanly at 4.2V and discharged without triggering an early low-voltage cutoff under the amplifier's current spikes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePulse 1 charge cycling tip:\u003c\/strong\u003e\n    Let the speaker drain below 20% at least once a month before plugging in. The Pulse 1 is commonly left on a desk and topped off constantly — that shallow-cycle pattern causes fuel gauge drift over time, so the charge indicator reads inaccurately well before the cell has actually degraded.\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 1 audio distorts before the battery indicator hits empty\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAs the Li-Polymer cell discharges toward its lower voltage limit, internal resistance rises. The amplifier then pulls peak current — particularly at high volume — and the cell can't sustain the voltage rail without momentary sag. That sag hits the amplifier's supply before the battery management system registers a low-charge event, so the fuel gauge still shows one or two bars while the audio clips. Replacing a cell that no longer holds a stable discharge curve fixes this directly — the distortion stops at the same volume levels once cell impedance is back in range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePulse 1 won't wake from USB after sitting unused for weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA deeply discharged Li-Polymer cell can drop below the minimum acceptance voltage for USB charging circuits — typically around 2.5V — and the charger sees no handshake and stops trying. The Pulse 1 shows no LED activity and appears completely dead. Plug it into a USB port and leave it connected for at least 30 to 60 minutes without touching the power button — some BMS controllers require a trickle recovery window before they allow fast-charge to begin. If nothing happens after that period, the original cell has likely dropped below recoverable depth and needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416219320410,"sku":"BWCS-JMP100SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416219353178,"sku":"BWCS-JMP100SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416219385946,"sku":"BWCS-JMP100SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JMP100SL-1.webp?v=1779760990","url":"https:\/\/batteryweb.com\/products\/jbl-pulse-1-replacement-battery-37v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}