{"product_id":"hp-pavilion-tx2600-replacement-battery-111v-3600mah-li-ion","title":"HP Pavilion TX2600 11.1V Replacement Battery HSTNN-CB45 3600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Pavilion TX2600 Series — 11.1V Li-ion Replacement Battery (HSTNN-CB45)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V 3600mAh (39.96Wh) Li-ion replacement battery for the HP Pavilion TX2600, TX2601, TX2602, and TX2603 convertible notebook. It fits the OEM battery bay and connects via the original multi-pin connector. Replaces HSTNN-CB45, HSTNN-OB45, HSTNN-W26C, 436426-351, and a range of compatible HP part numbers.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTX2600 series fitment:\u003c\/strong\u003e\n    The TX2600 through TX2603 share the same 11.1V battery rail, connector pinout, and BMS handshake protocol. One cell covers the full run of these convertible tablet-notebook units without any adapter or modification.\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 TX2600 hardware. The BMS communicated correctly with the BIOS, reported accurate state-of-charge, and did not trigger any abnormal charge cutoff or thermal event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration tip:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff on battery power alone — no AC — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false \"poor health\" flag that appears after almost 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\"\u003eWhy the TX2600 BIOS reports poor battery health after a fresh cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe TX2600 stores battery health history in the BIOS and reads EEPROM data from the outgoing cell. When a new cell goes in, that stored data does not match the fresh chemistry — the BIOS flags it as degraded before a single charge cycle runs. This is not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete charge clears the mismatch. After two to three full cycles, BIOS health reporting aligns with the actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTX2600 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 discharge curve. The gauge was mapped to the old, degraded cell — it cannot accurately predict the voltage cliff on a fresh battery. Under combined CPU and display load, the cell voltage drops faster than the stale gauge predicts, and the BIOS cuts power before the displayed percentage reaches zero. Run two full discharge-to-hibernate cycles without interruption, and the fuel gauge IC re-maps to the new cell. The shutdown-at-20% behaviour stops once calibration completes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410810830938,"sku":"BWCS-HTX2710NB-1","price":69.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410810863706,"sku":"BWCS-HTX2710NB-2","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410810896474,"sku":"BWCS-HTX2710NB-3","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTX2710NB-1.webp?v=1779581158","url":"https:\/\/batteryweb.com\/products\/hp-pavilion-tx2600-replacement-battery-111v-3600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}