{"product_id":"hp-elitebook-x360-1040-g55nw10ut-replacement-battery-77v-7200mah-li-polymer","title":"BL04XL HP EliteBook x360 1040 G5 Replacement Battery 7.7V 7200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP EliteBook x360 1040 G5 — 7.7V Li-Polymer Replacement Battery (BL04XL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.7V, 7200mAh (55.44Wh) Li-Polymer cell replaces the OEM BL04XL battery in the HP EliteBook x360 1040 G5 convertible notebook. It fits the full G5 production run, including units shipped as 5NW10UT, 5DG02EA, 5DF79EA, and 3SH44AV, among 47 additional configurations. The connector, BMS pinout, and EEPROM handshake match the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eG5 platform compatibility:\u003c\/strong\u003e\n    Every EliteBook x360 1040 G5 variant runs the same internal voltage rail and uses an identical four-cell Li-Polymer pack with the same BL04XL BMS handshake. One SKU covers the entire G5 run — there is no electrical difference between the sub-models listed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a G5 unit and confirmed the BMS completed a full charge handshake with the EC firmware. Charge current stepped correctly from bulk to taper, and the BIOS reported Wh capacity within expected tolerance of the rated 55.44Wh.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation calibration on the G5:\u003c\/strong\u003e\n    After fitting, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Without it, the fuel gauge IC has no reference data for the new cell and will report inaccurate state-of-charge readings for the first several sessions.\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 immediately after G5 cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe EliteBook x360 1040 G5 reads battery health from EEPROM data written to the pack during factory conditioning. When a replacement cell arrives, that EEPROM data does not match the charge history the BIOS expects from a \"healthy\" pack. The system flags the new cell as degraded before it has ever completed a cycle. Running the battery learn cycle — full discharge to hibernate, then uninterrupted charge to 100% — writes fresh reference data and clears the warning. After one complete cycle, the BIOS health indicator should return to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% remaining after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff, not a faulty cell. The fuel gauge IC on the G5 is still using calibration data from the old, degraded pack. It reports 20–30% remaining at a voltage point where the new cell actually has enough capacity left. Under full CPU and display load, voltage sags briefly below the EC cutoff threshold, and the system shuts down. Complete two full calibration cycles — discharge fully to hibernate, charge to 100% each time — so the fuel gauge IC maps the new cell's actual voltage curve. After calibration, the reported percentage and the real cutoff point will align.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409624432730,"sku":"BWCS-HPE364NB-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409624465498,"sku":"BWCS-HPE364NB-2","price":112.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409624498266,"sku":"BWCS-HPE364NB-3","price":123.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPE364NB-1.webp?v=1779580296","url":"https:\/\/batteryweb.com\/products\/hp-elitebook-x360-1040-g55nw10ut-replacement-battery-77v-7200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}