{"product_id":"msi-m655-replacement-battery-111v-4400mah-li-ion","title":"MSI M655 Laptop Replacement Battery 11.1V 4400mAh CBPIL48","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMSI M655 \/ M660 \/ M670 Series — 11.1V Li-ion Replacement Battery (CBPIL48 \/ BTY-M66)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V 4400mAh (48.84Wh) Li-ion cell that fits MSI M655, M660, M662, M670, and over 149 additional MSI notebook models sharing the same battery bay and connector. It replaces OEM part numbers including CBPIL48, BTY-M66, BTY-M67, SQU-511, SQU-529, and several others listed in the compatibility table. Capacity figures come from the product data — 4400mAh at 11.1V nominal.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide MSI notebook compatibility:\u003c\/strong\u003e\n    These MSI mid-range notebook lines share the same six-cell bay geometry, three-pin connector pinout, and BMS handshake protocol. A single cell revision covers multiple chassis generations without modification.\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 an M660 chassis. The BMS accepted the cell on first recognition, reported voltage correctly through the system EC, and charge termination triggered cleanly at capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on MSI notebooks:\u003c\/strong\u003e\n    After fitting this cell, run a full discharge to the hibernate cutoff point, then charge uninterrupted to 100% without unplugging mid-cycle. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on MSI firmware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the M655 BIOS flags a new cell as poor health immediately after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMSI notebooks store battery health data in EEPROM tied to the original cell's charge history. When a new cell is installed, the firmware compares current readings against the old cell's degraded baseline and flags a mismatch as poor health. This is a firmware read error, not a fault with the replacement cell. Running one full discharge-to-hibernate then uninterrupted full charge forces the EC to rewrite the EEPROM baseline against the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFuel gauge showing wildly wrong percentages for first few cycles\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC in the M655 and M660 series calibrates its percentage model against learned charge and discharge curves from the previous cell. A new cell with different internal resistance and fresh capacity throws the IC's model off, so readings jump or stall — commonly showing 100% then dropping suddenly to 40%. This is not a defective cell. The IC needs two to three full discharge-and-charge cycles to rebuild an accurate model against the new chemistry. After those cycles, percentage tracking stabilises and the voltage cliff disappears from the readout.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410851659866,"sku":"BWCS-AUF3NB-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410851692634,"sku":"BWCS-AUF3NB-2","price":86.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410851725402,"sku":"BWCS-AUF3NB-3","price":95.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF3NB-1.webp?v=1779581357","url":"https:\/\/batteryweb.com\/products\/msi-m655-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}