{"product_id":"hp-elitebook-845-g9-6f6r9ea-replacement-battery-1158v-4250mah-li-polymer","title":"WP03XL HP EliteBook 845 G9 Replacement Battery 11.58V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP EliteBook 845 G9 — 11.58V Li-Polymer Replacement Battery (WP03XL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.58V, 4250mAh (49.22Wh) Li-Polymer battery replacing the WP03XL cell in HP EliteBook 845 G9 and related EliteBook 840 G9 and 1040 G9 business notebooks. It fits the multi-model EliteBook line sharing the WP03XL platform, including the 6F6R9EA and 5Z6N4EA variants. Voltage and connector match the original HP specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEliteBook 840\/845\/1040 G9 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay geometry, connector pinout, and BMS handshake protocol. HP standardised the WP03XL cell across the G9 EliteBook line, so one cell covers the full chassis family without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an EliteBook 845 G9 and confirmed the BMS handshake completed correctly — BIOS recognised the battery, charge cycles initiated normally, and the protection circuit responded to charge cutoff at full capacity without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after installation:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff on battery alone, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle, clears the false \"poor health\" warning that appears after a cell swap, and gives the fuel gauge IC a clean baseline against the new cell's actual chemistry.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EliteBook 845 G9 BIOS flags a new battery as poor health\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP BIOS reads health data stored in the battery's EEPROM, not live cell voltage. When you swap cells, the EEPROM on the replacement doesn't match the charge history the BIOS was tracking on the old unit. The system interprets this mismatch as degradation. Running one full discharge-to-hibernate followed by an uninterrupted full charge lets the BIOS re-index against the new cell and clears the warning on most G9 units.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEliteBook shutting down at 20–30% charge remaining after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff symptom. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC expects based on uncalibrated EEPROM data from the old battery. The BIOS triggers a protection shutdown before the displayed percentage reaches zero. Two to three full discharge and charge cycles recalibrate the fuel gauge IC to the new cell's actual discharge curve. After calibration, shutdown should not occur above 5–7% on normal workloads.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409554079834,"sku":"BWCS-HPE845NB-1","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409554112602,"sku":"BWCS-HPE845NB-2","price":112.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409554145370,"sku":"BWCS-HPE845NB-3","price":125.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPE845NB-1.webp?v=1779580014","url":"https:\/\/batteryweb.com\/products\/hp-elitebook-845-g9-6f6r9ea-replacement-battery-1158v-4250mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}