{"product_id":"hp-2533t-replacement-battery-108v-6600mah-li-ion","title":"HP Compaq 2533t Replacement Battery 10.8V 6600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP EliteBook 2530p \/ 2533t \/ 2540p — 10.8V Li-ion Replacement Battery (412789-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 6600mAh (71.28Wh) Li-ion battery for the HP EliteBook 2530p, 2533t, 2540p, and the HP Compaq 2533t notebook. It replaces OEM part numbers 412789-001, HSTNN-XB21, HSTNN-XB22, HSTNN-XB23, BJ803AA, and MS06XL. Fits the standard battery bay — no tools required beyond a flat-head or coin to release the latch.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEliteBook 2530p, 2533t, and 2540p compatibility:\u003c\/strong\u003e\n    These three ultraportable business models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. All three pull from the same 10.8V rail and use the same latch-release mechanism, which is why one cell services all of them.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a 2530p and a 2540p. The BMS initialised cleanly on both, Windows reported the battery as present immediately, and the charge cycle completed without the controller tripping a fault or capping at 80% from a cold start.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on HP EliteBook:\u003c\/strong\u003e\n    After fitting this cell, run the laptop on battery from full charge down to hibernate cutoff — do not interrupt the discharge. Then charge uninterrupted to 100%. This forces the HP BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after any 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 EliteBook 2540p shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 2540p's EC (embedded controller) uses voltage-curve data stored from the previous cell to predict remaining capacity. A new cell has a different internal resistance profile, so the EC misreads the voltage cliff and triggers shutdown early. The fix is not a BIOS update — it is a calibration cycle. Discharge fully to hibernate, charge to 100% without interruption, and repeat once more. After two full cycles the EC re-maps the curve against the new cell and the premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" or \"unknown\" immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP BIOS reads health data from the battery's EEPROM, which carries rated-cycle and age data from the original cell at manufacture. A replacement cell arrives with EEPROM values the BIOS interprets as degraded relative to its internal baseline. This is a data-mismatch warning, not a fault with the new cell. Run the battery learn cycle — full discharge to hibernate, then full uninterrupted charge to 100% — and the BIOS health indicator will update to reflect the actual state of the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410822135898,"sku":"BWCS-CP2400HB-1","price":117.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410822168666,"sku":"BWCS-CP2400HB-2","price":134.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410822201434,"sku":"BWCS-CP2400HB-3","price":147.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CP2400HB-1.webp?v=1779581242","url":"https:\/\/batteryweb.com\/products\/hp-2533t-replacement-battery-108v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}