{"product_id":"accu-cs03xl-3900-mah-hp-elitebook-840-g3-g4-848-g3-850-g3-g4","title":"CS03XL Battery 3900mAh for HP EliteBook 840 G3 G4 \/ 848 G3 \/ 850 G3 G4","description":"\u003cp\u003eYour HP EliteBook 840 G3, G4, 848 G3 or 850 series no longer holds a charge or shuts off the moment you unplug? This CS03XL Li-polymer battery is the exact match at 11.4V \/ 3900mAh, ready to slide into the internal battery bay.\u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eModel: CS03XL\u003c\/li\u003e\n\u003cli\u003eVoltage: 11.4 V\u003c\/li\u003e\n\u003cli\u003eCapacity: 3900 mAh\u003c\/li\u003e\n\u003cli\u003eChemistry: Li-polymer\u003c\/li\u003e\n\u003cli\u003eOEM codes: HSTNN-IB6Y, HSTNN-DB6U, 800231-1C1, 800513-001, 800231-141\u003c\/li\u003e\n\u003cli\u003eFits: EliteBook 840\/848\/850 G3, 840\/850 G4, 745 G3\/G4\u003c\/li\u003e\n\u003cli\u003eBIOS-friendly: charges and calibrates immediately on install\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSymptoms of a faulty part\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCharge drops rapidly below 50%\u003c\/li\u003e\n\u003cli\u003eLaptop shuts off the instant the charger is unplugged\u003c\/li\u003e\n\u003cli\u003eWindows shows 'Plugged in — not charging'\u003c\/li\u003e\n\u003cli\u003eBattery reports \u003c50% design capacity in HP Battery Check\u003c\/li\u003e\n\u003cli\u003eBottom cover bulges from swollen cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e🟢 Easy\u003c\/strong\u003e · Estimated time: 15 minutes · Required tools: Phillips PH0.\u003cbr\u003ePower off, remove the bottom cover, disconnect the old battery (1 connector + 4 screws) and seat the new one in the exact same position.\u003c\/p\u003e\n\u003ch4\u003eFrequently asked questions\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this battery fit the EliteBook 840 G5?\u003c\/strong\u003e\u003cbr\u003eNo, the G5 uses SS03XL with different dimensions — not interchangeable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to reset the BIOS after fitting?\u003c\/strong\u003e\u003cbr\u003eNot strictly — let the battery cycle once full\/empty for accurate capacity reporting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes CS03XL work in the ProBook 640 G2?\u003c\/strong\u003e\u003cbr\u003eNo, the ProBook 640\/650 G2 uses CI03XL with a different connector.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does this battery fit the EliteBook 840 G5?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, the G5 uses SS03XL with different dimensions — not interchangeable.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to reset the BIOS after fitting?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not strictly — let the battery cycle once full\/empty for accurate capacity reporting.\"}},{\"@type\":\"Question\",\"name\":\"Does CS03XL work in the ProBook 640 G2?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, the ProBook 640\/650 G2 uses CI03XL with a different connector.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"HowTo\",\"name\":\"Replace CS03XL battery on EliteBook 840\/850\",\"totalTime\":\"PT15M\",\"tool\":[{\"@type\":\"HowToTool\",\"name\":\"Phillips PH0\"}],\"step\":[{\"@type\":\"HowToStep\",\"position\":1,\"name\":\"Shut down\",\"text\":\"Fully shut down Windows and remove the charger.\"},{\"@type\":\"HowToStep\",\"position\":2,\"name\":\"Open bottom cover\",\"text\":\"Loosen all PH0 screws and lift the panel.\"},{\"@type\":\"HowToStep\",\"position\":3,\"name\":\"Disconnect old battery\",\"text\":\"Unplug the battery connector and remove the 4 battery screws.\"},{\"@type\":\"HowToStep\",\"position\":4,\"name\":\"Fit new battery\",\"text\":\"Slide the CS03XL in, secure the screws and connect the lead.\"},{\"@type\":\"HowToStep\",\"position\":5,\"name\":\"Test\",\"text\":\"Plug in the charger, boot and confirm Windows charges normally.\"}]}\u003c\/script\u003e","brand":"Sunsky","offers":[{"title":"Default Title","offer_id":54472834974019,"sku":"SYA003169001","price":40.34,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/6256\/4706\/files\/SYA003169001.jpg?v=1778436223","url":"https:\/\/mackenners.com\/en-us\/products\/accu-cs03xl-3900-mah-hp-elitebook-840-g3-g4-848-g3-850-g3-g4","provider":"Mackenners","version":"1.0","type":"link"}