{"product_id":"thunderobot-st-pro-replacement-battery-148v-4000mah-li-ion","title":"Thunderobot ST-Pro 14.8V Replacement Battery 4000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eThunderobot ST-Pro Series — 14.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4000mAh (59.2Wh) Li-ion replacement battery for the Thunderobot ST-Pro, ST Pro-P1, ST Pro-670016G512G10606GWS, and ST-R3 laptops. It slots into the original battery bay and connects to the same power rail the motherboard expects. Capacity figures are from product data, not estimates.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eST-Pro and ST-R3 platform fit:\u003c\/strong\u003e\n    These models share the same 14.8V four-cell battery architecture, connector pinout, and BMS handshake protocol. One cell swap covers the full range without any adapter or firmware workaround.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on ST-Pro hardware. The BMS communicated correctly with the system, reported state-of-charge without error flags, and held voltage stable under sustained CPU and GPU load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the ST-Pro:\u003c\/strong\u003e\n    After installing, run one 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 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\n  \u003cp class=\"bpw-desc-p\"\u003eThe ST-Pro BIOS reads health data from EEPROM registers on the battery controller, not from live voltage. When you fit a new cell, those registers still reflect wear data from the old pack. The system flags it as degraded before the new cell has run a single cycle. Running one full discharge-to-hibernate then a full uninterrupted charge overwrites the learn cycle and forces the BIOS to recalculate health against the new cell's actual capacity. After one or two cycles, the health indicator returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eST-Pro shutting down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff — the cell can no longer sustain the voltage the CPU and display demand under full load, even though the fuel gauge still shows remaining capacity. The fuel gauge IC is calibrated against an old discharge curve, so it reads high while actual cell voltage drops below the motherboard's cutoff threshold. The fix is a full calibration cycle: discharge fully to automatic hibernate, then charge straight to 100% without interruption. After two cycles the fuel gauge IC maps its readings to the new cell's actual curve and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409676894298,"sku":"BWCS-CLP650NB-1","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409676927066,"sku":"BWCS-CLP650NB-2","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409676959834,"sku":"BWCS-CLP650NB-3","price":117.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLP650NB-1.webp?v=1779580400","url":"https:\/\/batteryweb.com\/products\/thunderobot-st-pro-replacement-battery-148v-4000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}