{"product_id":"compaq-business-notebook-6530s-replacement-battery-108v-6600mah-li-ion","title":"Compaq Business Notebook 6530s 10.8V Replacement Battery 484785-001","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCompaq Business Notebook 6530s Series — 10.8V Li-ion Replacement Battery (484785-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 10.8V, 6600mAh Li-ion battery replaces the original pack in the Compaq Business Notebook 6530s, 6535s, 6520s, and 6531s. It fits the physical bay and connector used across this notebook family. OEM part numbers 484785-001, HSTNN-DB51, 500014-001, KU530AA, HSTNN-OB51, 456623-001, 451545-361, and 451545-261 all cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6500-series notebook compatibility:\u003c\/strong\u003e\n    The 6520s, 6530s, 6531s, and 6535s share the same 10.8V three-cell voltage rail, identical connector pinout, and the same BMS handshake protocol — so one cell covers the full family without adaptation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, discharge, and BMS handshake verification on the 6530s platform. The protection circuit communicated correctly with the HP EC firmware, and charge termination triggered cleanly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the 6530s:\u003c\/strong\u003e\n    After fitting, run one full discharge until the laptop hibernates, then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell 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 6530s reads EEPROM data written by the original cell and compares it against current charge cycles and voltage behaviour. A brand-new cell presents data that doesn't match that history, so the BIOS flags it as degraded. This is a firmware interpretation issue, not a fault with the replacement. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — this re-trains the gauge IC and the BIOS health flag clears within one to two cycles.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve yet. The gauge reads 25% remaining, but the cell voltage is already dropping below the sustain threshold under combined CPU and display load — so the EC cuts power before the OS can act. It's not a defective cell; it's an uncalibrated gauge. Complete two full discharge-to-hibernate then uninterrupted-charge cycles, and the cutoff point will shift down to the correct 5–8% range. After calibration, confirm the cell holds above 10.0V under load at the 15% gauge mark.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410813354074,"sku":"BWCS-HPF540HB-1","price":124.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410813386842,"sku":"BWCS-HPF540HB-2","price":143.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410813419610,"sku":"BWCS-HPF540HB-3","price":157.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPF540HB-1.webp?v=1779581212","url":"https:\/\/batteryweb.com\/products\/compaq-business-notebook-6530s-replacement-battery-108v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}