{"product_id":"fujitsu-lifebook-q702-replacement-battery-144v-3050mah-li-polymer","title":"Fujitsu LifeBook Q702 14.4V Replacement Battery CP588146-01","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFujitsu LifeBook Q702 \/ Stylistic Q702 — 14.4V Li-Polymer Replacement Battery (CP588146-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.4V, 3050mAh (43.92Wh) Li-Polymer battery is a direct replacement for the Fujitsu LifeBook Q702 and Stylistic Q702. It targets degraded or dead cells that leave the ultraportable stranded on AC power. OEM part numbers CP588146-01, FBP0287, FMVNBP221, and FPCBP374 all cross to this unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLifeBook Q702 and Stylistic Q702 compatibility:\u003c\/strong\u003e\n    Both platforms share the same 14.4V battery rail, connector pinout, and BMS handshake protocol. A single cell swap covers either device without adapter changes or firmware workarounds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on the Q702 platform. The BMS negotiated correctly with the host, charge acceptance held steady across cycles, and the protection circuit tripped cleanly at low-voltage cutoff without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Q702:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge until the system hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false \"poor health\" warning that appears after every cell swap on the Q702.\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 Q702 BIOS reads health data stored in the outgoing cell's EEPROM. When a new cell arrives, that EEPROM data is either blank or mismatched, so the BIOS flags the battery as degraded before it has run a single cycle. This is not a fault with the replacement cell. Run one full discharge-to-hibernate followed by a full uninterrupted charge to 100%. The BIOS learn cycle writes fresh data to the new cell and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eQ702 shutting down at 20–30% charge shown on the gauge\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 voltage curve. The gauge under-reports remaining charge, and the system hits its shutdown threshold while the cell still holds usable capacity. It is not a dead cell. Complete two to three full discharge and charge cycles without interruption. After calibration, the displayed percentage aligns with the cell's real state of charge and early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409659953242,"sku":"BWCS-FUQ702NB-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409659986010,"sku":"BWCS-FUQ702NB-2","price":87.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409660018778,"sku":"BWCS-FUQ702NB-3","price":97.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FUQ702NB-1.webp?v=1779580340","url":"https:\/\/batteryweb.com\/products\/fujitsu-lifebook-q702-replacement-battery-144v-3050mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}