{"product_id":"hasee-hp550-replacement-battery-111v-4400mah-li-ion","title":"Hasee HP550 Compatible Battery 11.1V 4400mAh SQU-805","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHasee HP550 \/ HP650 Series — 11.1V Li-ion Replacement Battery (SQU-805)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the Hasee HP550, HP560, HP640, and HP650 notebook series. It fits the original battery bay and connects to the same three-pin connector as the factory cell. OEM part numbers covered include SQU-804, SQU-805, SQU-807, and SW8-3S4400-B1B1.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHP550 \/ HP650 platform fit:\u003c\/strong\u003e\n    These models share the same 11.1V three-cell series configuration, connector pinout, and BMS handshake protocol — one cell covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on an HP550 board. The BMS completed full charge termination correctly, and the protection circuit tripped at the expected over-discharge threshold without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the HP550:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it reaches hibernate cutoff — do not interrupt. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells 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\"\u003eLaptop shutting down at 20–30% shown on the HP550 and HP650\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the HP550, the fuel gauge IC estimates remaining charge based on learned discharge curves from the previous cell. A new cell has different internal resistance, so the voltage curve doesn't match what the IC expects. The system triggers shutdown before the cell is actually empty. Running two full discharge-to-hibernate and uninterrupted charge cycles teaches the IC the new cell's curve and corrects the cutoff point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor or \"unknown\" immediately after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from EEPROM registers in the battery's fuel gauge IC. A replacement cell ships with factory EEPROM defaults that don't match the HP550's charge history — the BIOS flags this as degraded or unrecognised. This is not a fault with the cell itself. Complete one full calibration cycle first: discharge to hibernate cutoff, then charge to 100% without interruption, and the BIOS health status will update correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409823236186,"sku":"BWCS-FQU804NB-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409823268954,"sku":"BWCS-FQU804NB-2","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409823301722,"sku":"BWCS-FQU804NB-3","price":85.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/batteryweb.com\/products\/hasee-hp550-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}