{"product_id":"medion-md40632-replacement-battery-148v-4400mah-li-ion","title":"Medion MD40632 Replacement Battery 14.8V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMedion MD40632 \/ MD40780 — 14.8V Li-ion Replacement Battery (442673400015)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4400mAh (65.12Wh) Li-ion battery for the Medion MD40632 and MD40780 laptops, as well as the Gericom 8640 and 1st Supersonic ForceXL 8640 series. It replaces OEM part numbers including 442673400015, 40004852, and NBP001310-00. When the original cell no longer holds charge, this swap restores full untethered operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMD40632 \/ MD40780 \/ Gericom 8640 platform fit:\u003c\/strong\u003e\n    These models share a common 14.8V four-cell Li-ion architecture with the same physical connector and BMS handshake protocol. The cell count and voltage rail are identical across the group, which is why one part number covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on compatible hardware. The BMS negotiated correctly, protection circuits responded to over-current events as expected, and the fuel gauge IC began tracking state-of-charge after two full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap learn cycle for the MD40632:\u003c\/strong\u003e\n    After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. 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 poor battery health immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Medion BIOS stores health and cycle data in EEPROM on the old battery pack. When a new cell is installed, that EEPROM data does not exist yet, so the BIOS flags the battery as degraded or unknown. This is a firmware state issue, not a fault with the replacement cell. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the BIOS learn cycle and overwrites the stale health data. After two full cycles, the reported health status should normalise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load, even though the OS fuel gauge still shows charge remaining. The fuel gauge IC has not yet calibrated against the new cell's actual discharge curve, so its percentage estimate runs ahead of real voltage. The cutoff trips not because the battery is faulty, but because the gauge is reading inaccurately against an uncalibrated baseline. Let the laptop discharge fully to hibernate at least twice — the fuel gauge IC maps the new cell's curve and the premature shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410829312090,"sku":"BWCS-MT8630NB-1","price":80.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410829344858,"sku":"BWCS-MT8630NB-2","price":93.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410829377626,"sku":"BWCS-MT8630NB-3","price":104.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MT8630NB-big.webp?v=1779581286","url":"https:\/\/batteryweb.com\/products\/medion-md40632-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}