{"product_id":"samsung-ultrabook-940x3g-replacement-battery-76v-6100mah-li-polymer","title":"Samsung Ultrabook 940X3G Compatible Battery 7.6V 6100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Ultrabook 940X3G — 7.6V Li-Polymer Replacement Battery (AA-PLVN4CR)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.6V, 6100mAh (46.36Wh) lithium-polymer cell replaces the original AA-PLVN4CR battery in the Samsung Ultrabook 940X3G. It fits the thin-profile chassis of this ultrabook and connects via the original flex ribbon connector. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e940X3G platform fit:\u003c\/strong\u003e\n    The 940X3G uses a sealed ultrabook chassis with a dedicated battery bay and a proprietary flex connector tied to the BMS handshake. This cell carries the correct EEPROM header data so the system firmware recognises it without a hardware fault flag on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the 940X3G platform. The BMS accepted the cell immediately, reported state-of-charge correctly after two calibration cycles, and showed no voltage sag under sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the 940X3G:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff on a normal workload — do not force-shutdown. 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\"\u003eBIOS reporting poor battery health after fitting the AA-PLVN4CR replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's BIOS reads health data from the EEPROM stored on the battery controller, not from live cell measurements. When a new cell is installed, the EEPROM registers no learned cycles, so the firmware flags it as degraded before any calibration has run. This is a firmware state issue, not a cell fault. One full discharge-to-hibernate followed by an uninterrupted charge to 100% writes fresh learn-cycle data and clears the warning. After two complete cycles the health indicator should read normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003e940X3G shutting down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC in the 940X3G estimates remaining capacity from voltage curves mapped to the original cell. A new cell has a slightly different voltage-to-capacity curve until it has been calibrated. Under full CPU and display load, voltage drops faster than the gauge predicts, and the BMS triggers a hard shutdown before the displayed percentage reaches zero. This is not a faulty cell — it is a calibration gap. Run two full discharge-to-hibernate and charge-to-100% cycles to remap the curve. After calibration the shutdown threshold should align with 5% or below.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409665261658,"sku":"BWCS-SMU940NB-1","price":82.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409665294426,"sku":"BWCS-SMU940NB-2","price":96.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409665327194,"sku":"BWCS-SMU940NB-3","price":107.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMU940NB-1.webp?v=1779580359","url":"https:\/\/batteryweb.com\/products\/samsung-ultrabook-940x3g-replacement-battery-76v-6100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}