{"product_id":"teclast-f5-replacement-battery-76v-3300mah-li-polymer","title":"Teclast F5 Notebook Compatible Battery 7.6V 3300mAh 2666144","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTeclast F5 — 7.6V Li-Polymer Replacement Battery (2666144)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.6V, 3300mAh (25.08Wh) lithium-polymer cell replaces the original battery in the Teclast F5 notebook. It fits the slim chassis directly, matching the OEM connector and BMS handshake protocol. Part numbers 2666144 and H-30137162 both cross-reference to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTeclast F5 fitment:\u003c\/strong\u003e\n    The F5 uses a flat Li-Polymer pouch cell at 179.00 × 153.16 × 3.00mm — unusually thin for a notebook pack. This replacement matches that footprint exactly, so the back panel closes flush and the connector seats without force.\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 F5-compatible hardware. The BMS communicated correctly with the host system, accepted a full charge without tripping overcurrent protection, and reported state-of-charge data to the OS without errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the F5:\u003c\/strong\u003e\n    After fitting, discharge the laptop to hibernate cutoff under normal workload — do not force shutdown. Then charge uninterrupted to 100%. This one cycle lets the F5's fuel gauge IC re-baseline against the new cell and clears the inaccurate health flag the BIOS raises 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\"\u003eWhy the Teclast F5 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe F5's fuel gauge IC builds a voltage-to-capacity map against the original cell. When you install a new cell, that map is stale. Under full CPU and display load, the new cell's voltage drops faster than the old curve predicts. The BIOS interprets that voltage cliff as imminent cell death and triggers an emergency shutdown — even though the cell still has charge remaining. Running one full discharge-to-hibernate cycle forces the IC to relearn the voltage curve and eliminates the premature cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS showing 0% or \"unknown battery\" immediately after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe F5 reads battery identity and rated capacity from EEPROM data embedded in the original pack. A replacement cell ships with its own EEPROM values, which can conflict with the cached data the BIOS holds from the previous battery. The OS then displays 0%, \"plugged in, not charging,\" or an unknown device warning. Power the laptop off completely, remove the charger for 30 seconds, then boot with the charger connected — this forces a fresh EEPROM handshake and the BIOS re-registers the cell at its correct 25.08Wh rating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409590714458,"sku":"BWCS-TLF500NB-1","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409590747226,"sku":"BWCS-TLF500NB-2","price":69.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409590779994,"sku":"BWCS-TLF500NB-3","price":77.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TLF500NB-1.webp?v=1779580146","url":"https:\/\/batteryweb.com\/products\/teclast-f5-replacement-battery-76v-3300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}