{"product_id":"ifunk-ste003-replacement-battery-148v-4000mah-li-polymer","title":"Ifunk STE003 Replacement Battery 14.8V 4000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIfunk STE003 \/ STE003A — 14.8V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4000mAh (59.2Wh) lithium-polymer replacement battery for the Ifunk STE003 and STE003A laptops. It replaces the original cell when capacity has degraded or the pack no longer holds charge. No OEM part number is published for this model — fit is confirmed by voltage, physical dimensions, and connector match.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSTE003 and STE003A compatibility:\u003c\/strong\u003e\n    Both models run the same 14.8V power rail with an identical connector and BMS handshake. The cell measures 212.70 × 68.35 × 13.50mm — physically interchangeable between the two variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge, load, and BMS cutoff on the bench. The protection circuit responded correctly at both high and low voltage limits, and the cell held stable output under sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the STE003:\u003c\/strong\u003e\n    After fitting this cell, 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 fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe STE003 BIOS reads health data from EEPROM embedded in the battery pack. When a new cell is installed, that EEPROM data does not match the history the BIOS accumulated from the old pack, so it flags the battery as degraded or unknown. This is a data mismatch — not a fault with the new cell. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the BIOS enough data to write a fresh baseline. After one or two complete cycles, the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop cuts out at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old, degraded cell and the displayed percentage no longer maps accurately to actual cell voltage. Under full CPU and display load, the new cell hits a voltage cliff the gauge did not anticipate, and the system shuts down as a protection measure. The fix is calibration: discharge fully to hibernate-cutoff and recharge to 100% without interruption — repeat this two or three times. After those cycles, the fuel gauge IC recalibrates against the new cell's actual voltage curve and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409543299162,"sku":"BWCS-ARG200NB-1","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409543331930,"sku":"BWCS-ARG200NB-2","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409543364698,"sku":"BWCS-ARG200NB-3","price":110.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ARG200NB-1.webp?v=1779579964","url":"https:\/\/batteryweb.com\/products\/ifunk-ste003-replacement-battery-148v-4000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}