{"product_id":"jbl-pulse-5-replacement-battery-37v-7800mah-li-ion","title":"JBL Pulse 5 Replacement Battery 3.7V 7800mAh GSP-1S3P-CH4D","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Pulse 5 — 3.7V Li-ion Replacement Battery (GSP-1S3P-CH4D)\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 5 portable Bluetooth speaker. It fits the Pulse 5 directly, matching the OEM part number GSP-1S3P-CH4D. Replace this when the original cell no longer holds a useful charge or fails to power the speaker at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePulse 5 cell match:\u003c\/strong\u003e\n    The Pulse 5 runs a single-cell 3.7V pack with a protection circuit that monitors cell voltage and temperature. This replacement uses the same nominal voltage and capacity, so the onboard fuel gauge reads correctly after a full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the battery through charge and discharge cycles on the Pulse 5 board. The BMS accepted the cell without tripping low-voltage lockout, and the charge IC completed a full CC\/CV cycle to 4.2V without flagging a fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge routine for Pulse 5 users:\u003c\/strong\u003e\n    Letting the speaker run down below 20% at least once a month prevents fuel gauge drift. The Pulse 5 is frequently used at a desk or countertop where it gets topped off constantly — that shallow cycling pattern accelerates capacity fade on the Li-ion cell faster than occasional deep use would.\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 5 reads full charge but audio cuts out early\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pulse 5 fuel gauge estimates remaining capacity based on voltage curves learned from previous cycles. When the cell degrades or a new cell hasn't been calibrated, the gauge loses accuracy and the speaker shuts down from BMS undervoltage while still showing bars on screen. The fix is a full charge to 4.2V followed by an uninterrupted discharge to automatic shutoff — this recalibrates the gauge to the actual cell capacity. Do this twice after fitting a new cell for the most accurate readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distorting before the battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt high volume, the Pulse 5 amplifier draws a sharp current spike. If the cell has aged or is discharging under a combined amplifier and radio load, internal resistance causes voltage to sag below the amplifier's clean operating threshold before the battery indicator triggers low. The result is clipping distortion — the audio sounds crushed or crackles — even though the indicator still shows charge remaining. Fitting a fresh cell with lower internal resistance brings the voltage back above the amplifier threshold under load. If distortion persists on a new cell, check that the USB-C port is delivering a full charge to 4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416205099098,"sku":"BWCS-JMP500SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416205131866,"sku":"BWCS-JMP500SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416205164634,"sku":"BWCS-JMP500SL-3","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JMP500SL-1.webp?v=1779760769","url":"https:\/\/batteryweb.com\/products\/jbl-pulse-5-replacement-battery-37v-7800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}