{"product_id":"msi-ex600-replacement-battery-111v-6600mah-li-ion","title":"MSI EX600 11.1V 6600mAh Replacement Battery 90-NFY6B1000Z","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMSI EX600 \/ M660 Series — 11.1V Li-ion Replacement Battery (90-NFY6B1000Z)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 6600mAh (73.26Wh) Li-ion battery for the MSI EX600 notebook and compatible M-series laptops. It replaces the original cell when the factory pack no longer holds a charge or fails to complete a charge cycle. Fits a broad range of MSI notebook platforms sharing the same voltage rail and connector spec, including the M655, M660, and M662.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEX600 and M-series platform fit:\u003c\/strong\u003e\n    These models share a common 11.1V three-cell architecture, identical connector pinout, and the same BMS communication protocol — which is why one battery spans all of them. Swapping across these platforms does not require firmware changes or hardware modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on an MSI M660 platform. The BMS handshake completed correctly, charge acceptance registered immediately, and the protection circuit tripped at the expected low-voltage cutoff threshold without false shutdown events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the EX600:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to the BIOS 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 MSI notebooks.\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 fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from EEPROM stored on the battery's BMS board — not from the cells themselves. When a new cell arrives, that EEPROM may carry factory default values that don't match what the BIOS expects to see after a full charge. MSI notebooks flag this as \"poor health\" or \"battery unknown\" on first boot. One complete learn cycle — full discharge to hibernate cutoff, then uninterrupted charge to 100% — rewrites the BIOS battery data and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEX600 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure — the cell can no longer sustain adequate voltage under the combined load of the CPU, GPU, and display, even though the fuel gauge still reads 20–30%. The fuel gauge IC is calibrated against the old cell's discharge curve, so it cannot accurately predict the new cell's cutoff point for the first few cycles. The laptop interprets the sudden voltage drop as a critical low-battery condition and cuts power before the gauge catches up. Run two to three full discharge-to-hibernate cycles and the fuel gauge IC will recalibrate against the new cell's actual curve, resolving the early shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410817384538,"sku":"BWCS-AUF3HB-1","price":118.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410817417306,"sku":"BWCS-AUF3HB-2","price":135.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410817450074,"sku":"BWCS-AUF3HB-3","price":148.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF3HB-1.webp?v=1779581181","url":"https:\/\/batteryweb.com\/products\/msi-ex600-replacement-battery-111v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}