{"product_id":"bose-s1-pro-replacement-battery-144v-6800mah-li-ion","title":"Bose S1 Pro 14.4V Replacement Battery 789175","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBose S1 Pro Multi-Position PA System — 14.4V Li-ion Replacement Battery (789175)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.4V 6800mAh Li-ion battery replaces OEM part 789175 in the Bose S1 Pro, S1 Pro System, and S1 Pro Multi-Position PA System. It restores full portable operation when the original cell can no longer hold a usable charge. At 97.92Wh, it matches the energy capacity the S1 Pro amplifier expects from a healthy pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS1 Pro platform fit:\u003c\/strong\u003e\n    All three S1 Pro variants — S1 Pro, S1 Pro System, and S1 Pro Multi-Position PA System — share the same battery bay geometry, connector pinout, and BMS communication protocol. One battery fits all three without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on the S1 Pro. The BMS handshook correctly, the fuel gauge reported accurately from 100% down to the low-battery cutoff, and the amplifier showed no mid-cycle shutdown.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle on the S1 Pro:\u003c\/strong\u003e\n    If the S1 Pro sits on a desk and gets topped off constantly before dropping below 50%, the fuel gauge drifts and capacity fades faster than normal cycling. Let the pack run below 20% at least once a month before recharging to keep the cell calibration accurate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distorting before the S1 Pro battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the pack is aged or a replacement cell has higher internal resistance than the original, voltage sags under the combined amplifier and radio draw before the battery gauge triggers the low-battery warning. The amplifier hits its minimum rail voltage and clips the signal first. This produces audible distortion — usually at higher volumes — while the indicator still shows one or two bars. Check resting voltage at that point: if it reads below 13.5V under load, the cell is sagging too hard and needs replacement.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eS1 Pro showing full charge bars but audio drops out after extended play\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is fuel gauge drift — common in packs that have been shallow-cycled for months without a full discharge. The cell's actual state of charge diverges from what the BMS reports, so the indicator reads full while the usable capacity is significantly lower. A full discharge to the S1 Pro's automatic cutoff, followed by an uninterrupted charge to 100%, forces the BMS to recalibrate its charge estimation. If the symptom persists after two full cycles, the cell has degraded past recovery and replacement is the correct fix.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416183996506,"sku":"BWCS-BSS100XL-1","price":208.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416184029274,"sku":"BWCS-BSS100XL-2","price":248.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416184062042,"sku":"BWCS-BSS100XL-3","price":277.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BSS100XL_1.webp?v=1779760587","url":"https:\/\/batteryweb.com\/products\/bose-s1-pro-replacement-battery-144v-6800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}