{"product_id":"lg-xnote-p420-replacement-battery-111v-4400mah-li-ion","title":"LG Xnote P420 Compatible Battery 11.1V 4400mAh SQU-1007","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG Xnote P420 \/ PD420 — 11.1V Li-ion Replacement Battery (SQU-1007)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh Li-ion battery replacing part numbers SQU-1007, SQU-1017, and EAC61538601. It fits the LG Xnote P420, Xnote PD420, S430, and Aurora ONOTE S430 series notebooks. Physical dimensions are 204.50 × 50.00 × 20.54mm — confirm clearance before fitting if your chassis has been modified.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP420 and PD420 platform fitment:\u003c\/strong\u003e\n    Both the P420 and PD420 share the same battery bay geometry, connector pinout, and BMS handshake protocol. SQU-1007 and SQU-1017 are interchangeable across these models because LG kept the same voltage rail and communication line through the series refresh.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on a P420 chassis. The BMS handshake completed without fault codes, charge current stepped down correctly at the CV phase, and the protection circuit tripped at the expected low-voltage threshold under load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the P420:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it hibernates at low charge cutoff, then charge uninterrupted to 100% without using the machine. 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 Xnote P420 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe P420's BIOS maps voltage curves from the original cell's EEPROM data. A new cell has different internal resistance and a slightly different discharge curve, so the fuel gauge IC miscalculates remaining capacity. The BIOS sees voltage drop under CPU and display load, interprets it as a depleted cell, and cuts power — even though real charge remains. Running two to three full discharge-to-hibernate and full-charge cycles lets the fuel gauge IC re-learn the new cell's curve and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery Wh as incorrect or unknown after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe system reads Wh rating from EEPROM data embedded in the battery's protection circuit board, not from the cells directly. If the EEPROM on the replacement carries a different rated value than the original, BIOS will display a mismatched or unknown Wh figure. This is a data mismatch between the PCB firmware and the BIOS table — not a fault with the cells themselves. Check the reported voltage is still 11.1V; if it is, the cell is functioning correctly regardless of what the Wh field displays.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409793646682,"sku":"BWCS-LPD420NB-1","price":75.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409793679450,"sku":"BWCS-LPD420NB-2","price":87.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409793712218,"sku":"BWCS-LPD420NB-3","price":97.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LPD420NB-1.webp?v=1779580887","url":"https:\/\/batteryweb.com\/products\/lg-xnote-p420-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}