{"product_id":"lg-xnote-a405-replacement-battery-111v-4400mah-li-ion","title":"LG Xnote A405 Replacement Battery 11.1V 4400mAh SQU-902","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG Xnote A405 \/ A410 \/ A505 Series — 11.1V Li-ion Replacement Battery (SQU-902)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) lithium-ion replacement battery for the LG Xnote A405, A410, A505, A515, and related Xnote notebook models. It replaces OEM part numbers SQU-902, SQU-914, 916T2017F, CQB901, CQBP901, and CQB904. If the original cell no longer holds charge or fails to register in the OS, this cell restores full unplugged operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXnote A-series compatibility:\u003c\/strong\u003e\n    The A405, A410, A505, and A515 share the same battery bay dimensions, connector pinout, and BMS handshake protocol across this generation. One cell covers the full platform.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, discharge, and system recognition on an Xnote A-series unit. The BMS completed a full handshake, the OS registered capacity correctly, and charge cycling completed without cutoff errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the Xnote:\u003c\/strong\u003e\n    After installing, run one full discharge until the laptop hibernates on low battery, then charge uninterrupted to 100% without interruption. 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 battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Xnote BIOS stores capacity and health data from the previous cell in EEPROM. When a new cell is installed, the firmware compares live readings against that stored baseline and flags the result as degraded. This is not a fault with the replacement cell — the stored data simply has not been overwritten yet. Run a full discharge to hibernate-cutoff followed by an uninterrupted charge to 100%. After one complete learn cycle, the BIOS recalibrates and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down with 20–30% charge still shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual chemistry. The displayed percentage is still mapped to the old cell's discharge curve, so the OS reads 25% while the real cell voltage has already dropped below the minimum sustain threshold under full CPU and display load. The voltage cliff hits before the gauge catches up, and the system cuts power to protect the hardware. Run two to three full discharge-and-charge cycles and the fuel gauge IC will remap its curve to the new cell — shutdowns at false percentages stop after calibration completes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409810522202,"sku":"BWCS-LXA410NB-1","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409810554970,"sku":"BWCS-LXA410NB-2","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409810587738,"sku":"BWCS-LXA410NB-3","price":130.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LXA410NB-1.webp?v=1779581043","url":"https:\/\/batteryweb.com\/products\/lg-xnote-a405-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}