{"product_id":"cms-icbook-m1-replacement-battery-111v-4400mah-li-ion","title":"BTY-S11 CMS ICBook M1 Replacement Battery 11.1V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCMS ICBook M1 — 11.1V Li-ion Replacement Battery (BTY-S11)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh Li-ion replacement battery for the CMS ICBook M1 notebook. It fits the BTY-S11 slot directly and restores portable operation when the original cell has degraded or failed to hold charge. Capacity is 48.84Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eICBook M1 fitment:\u003c\/strong\u003e\n    The BTY-S11 connector and BMS handshake are specific to the ICBook M1 platform. The cell voltage rail and pin layout match what the ICBook M1 charging circuit expects — no adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the ICBook M1 platform. The BMS communicated correctly with the system board, protection circuits triggered at the correct thresholds, and the cell accepted a full charge without cutoff errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the ICBook M1:\u003c\/strong\u003e\n    After fitting this battery, run the cell down fully until the laptop hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Skipping this step often causes the system to report incorrect health or capacity readings immediately after the swap.\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 after fitting the BTY-S11\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a new cell is installed, the BIOS still holds EEPROM data from the old battery. That data includes cycle count and health metrics that no longer match the new cell. The system reads the stored values and flags the battery as degraded before a single cycle has run. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite the battery learn cycle against the new cell and clears the false health warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eICBook M1 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge miscalculates remaining capacity and the system hits a low-voltage cutoff while the on-screen percentage still reads high. It is not a fault with the replacement cell — it resolves after two or three full discharge and charge cycles. Run the laptop on battery until it hibernates naturally, charge fully to 100%, and repeat twice to align the fuel gauge to the new cell chemistry.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410826330202,"sku":"BWCS-MSU100HB-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410826362970,"sku":"BWCS-MSU100HB-2","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410826395738,"sku":"BWCS-MSU100HB-3","price":116.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MSU100HB-1.webp?v=1779581287","url":"https:\/\/batteryweb.com\/products\/cms-icbook-m1-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}