{"product_id":"jbl-charge-3-replacement-battery-37v-6000mah-li-polymer","title":"JBL Charge 3 Replacement Battery GSP1029102A 3.7V 6000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Charge 3 \/ Charge 3 Stealth Edition — 3.7V Li-Polymer Replacement Battery (GSP1029102A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 6000mAh Li-Polymer battery replaces the original GSP1029102A cell in the JBL Charge 3 and Charge 3 Stealth Edition portable Bluetooth speakers. It fits both variants — the standard and all-black Stealth edition share the same battery bay and connector. Swap it when the original no longer holds a charge or shuts down under audio load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCharge 3 and Stealth Edition compatibility:\u003c\/strong\u003e\n    Both models use the same 3.7V single-cell architecture, identical connector pinout, and the same BMS communication protocol. The battery slots in without modification to either housing variant.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Charge 3 unit. The onboard BMS accepted the cell without fault codes, cell balance held across full cycles, and the protection circuit triggered correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCharge cycle discipline for daily-use speakers:\u003c\/strong\u003e\n    Let the Charge 3 drain below 20% at least once a month before plugging in. Constant top-off charging from 60–80% without full discharge cycles causes fuel gauge drift — the speaker reports full battery but actual capacity is significantly lower.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under amplifier load at high volume on the Charge 3\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Charge 3 amplifier pulls a sharp current spike when you push volume above 80%. On a degraded or deeply discharged cell, this spike drops the terminal voltage fast enough to trip the BMS undervoltage protection. The speaker cuts out, recovers, then cuts again — a cycle that looks like a Bluetooth issue but is actually a battery problem. A fresh 6000mAh cell with low internal resistance handles those transient spikes without the voltage rail collapsing below the BMS threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSpeaker shows full charge indicator but shuts down after short playback\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is fuel gauge drift, not a charging fault. The Charge 3 fuel gauge IC calibrates its state-of-charge estimate against previous cycle data. If the battery has been shallow-cycled for months — always charged before it drops below 50% — the gauge loses accuracy and reports 100% on a cell that may only have 30–40% usable capacity remaining. Replacing the cell resets the baseline, but you need to run two or three full discharge-to-charge cycles after fitting to let the gauge re-calibrate. Discharge to below 3.5V per cell before each recharge during those first cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416224858202,"sku":"BWCS-JML330SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416224890970,"sku":"BWCS-JML330SL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416224923738,"sku":"BWCS-JML330SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JML330SL-1.webp?v=1779760990","url":"https:\/\/batteryweb.com\/products\/jbl-charge-3-replacement-battery-37v-6000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}