{"product_id":"sony-vaio-s11-replacement-battery-76v-4500mah-li-polymer","title":"Sony VAIO S11 Replacement Battery 7.6V 4500mAh VJ8BPS52","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony VAIO S11 \/ S13 Series — 7.6V Li-Polymer Replacement Battery (VJ8BPS52)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 4500mAh (34.2Wh) lithium-polymer battery that replaces the OEM part VJ8BPS52. It fits the Sony VAIO S11, VAIO S13, and extended model variants including VJ-S13-1X0111B and VJS131C0111B. The slim 6.74mm profile matches the original cell's form factor inside the chassis.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVAIO S11 and S13 compatibility:\u003c\/strong\u003e\n    Both the S11 and S13 share the same 7.6V battery rail, connector pinout, and BMS handshake protocol, which is why a single cell covers both platforms. The SMBus communication lines between the battery and the VAIO's EC controller use the same register map across this generation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on an S13 chassis, monitoring BMS communication and charge termination. The protection circuit responded correctly to overvoltage, over-discharge, and thermal events without tripping a fault latch.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning for VAIO S-series:\u003c\/strong\u003e\n    After installing, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the VAIO S11 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe VAIO's fuel gauge IC retains voltage-to-capacity mapping from the old, degraded cell. When the new cell hits a voltage point that the old map labelled as 20–30%, the EC triggers a forced shutdown — even though the new cell still has charge remaining. The fix is a full discharge-to-hibernate cycle followed by a complete charge. After two to three of these calibration cycles, the fuel gauge IC recalibrates against the new cell's actual discharge curve and the premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting the replacement cell as \"poor health\" or unknown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the BIOS reads EEPROM health data written by the previous cell, not the physical state of the new one. The health register on the old cell accumulated cycle count and degradation flags that persist in the EC's memory after a swap. Run the Sony battery care utility or cycle the battery fully twice — charge to 100%, discharge to hibernate cutoff, repeat. After two full cycles, the BIOS recalculates health from live data and the warning clears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409700847706,"sku":"BWCS-BPS13NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409700880474,"sku":"BWCS-BPS13NB-2","price":105.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409700913242,"sku":"BWCS-BPS13NB-3","price":117.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BPS13NB-1.webp?v=1779580453","url":"https:\/\/batteryweb.com\/products\/sony-vaio-s11-replacement-battery-76v-4500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}