{"product_id":"sim-1029-replacement-battery-111v-4400mah-li-ion","title":"SIM 1029 Laptop Replacement Battery 11.1V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSIM 1029 \/ 1053 \/ 1054 \/ 1064 Series — 11.1V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion battery for SIM notebooks including the 1029, 1053, 1054, and 1064 series. It replaces the original cell when the laptop no longer holds a useful charge or fails to power on from battery. Physical dimensions are 136.27 x 72.20 x 20.09mm — confirm these match your bay before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1029 \/ 1053 \/ 1054 \/ 1064 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay format, connector pinout, and BMS communication protocol. One cell covers all of them without modification or adapter.\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 a SIM notebook. The BMS handshake initialised correctly, charge acceptance reached full capacity, and the protection circuit tripped at the expected low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on SIM notebooks:\u003c\/strong\u003e\n    After installing, run a full discharge 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.\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 installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from EEPROM registers written by the original cell. A new cell brings its own EEPROM state, which the BIOS interprets as degraded because the charge history does not match expectations. This is a data mismatch, not a fault with the new battery. Run one complete discharge-to-hibernate followed by a full uninterrupted charge — the BIOS learn cycle rewrites those registers against the new cell and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom points to a voltage cliff — the cell drops below the minimum threshold under combined CPU and display load before the fuel gauge reaches zero. The OS fuel gauge IC was calibrated against the old, degraded cell and its discharge curve no longer maps correctly to the new chemistry. The fix is the same calibration cycle: drain to hibernate-cutoff under normal use load, then charge to 100% without interruption. After two or three full cycles the fuel gauge recalibrates and the early shutdown stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409820713050,"sku":"BWCS-UNT410NB-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409820745818,"sku":"BWCS-UNT410NB-2","price":85.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409820778586,"sku":"BWCS-UNT410NB-3","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-UNT410NB-1.webp?v=1779581113","url":"https:\/\/batteryweb.com\/products\/sim-1029-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}