{"product_id":"dell-inspiron-1564-replacement-battery-111v-6600mah-li-ion","title":"Dell Inspiron 1564 Replacement Battery 11.1V 6600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Inspiron 1564 Series — 11.1V Li-ion Replacement Battery (312-1021)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 6600mAh (73.26Wh) Li-ion replacement battery for the Dell Inspiron 1564, 1564D, 1564R, and I1564 notebooks. It slots into the standard battery bay and connects via the original latch-and-contact system. Cross-reference OEM part numbers include 312-1021, 5YRYV, JKVC5, NKDWV, FH4HR, and CW435, among others listed above.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspiron 1564 platform fit:\u003c\/strong\u003e\n    The 1564, 1564D, and 1564R share the same battery bay geometry, contact layout, and BMS communication protocol — one cell works across all three variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a 1564 chassis and confirmed the BMS handshake completes on first insertion, charge current ramps normally to 8.25V per cell pair, and the SMBus reports a valid pack ID to the BIOS without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the Inspiron 1564:\u003c\/strong\u003e\n    After installing, run one full discharge to the hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health or low-capacity 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 Inspiron 1564 BIOS reads health data from EEPROM registers stored on the battery's fuel gauge IC. When a new cell ships, those registers reflect factory defaults — not data learned from the specific notebook. The BIOS compares the reported design capacity against its stored baseline and flags a mismatch as \"poor health.\" Running one full discharge-to-hibernate then a full charge-to-100% lets the fuel gauge IC write calibrated data back to EEPROM and clears the flag on next boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down hard at 20–30% shown on the gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the BMS cutoff threshold under the combined load of the CPU and display — even though the fuel gauge still shows charge remaining. The gauge IC is reading stored state-of-charge data that no longer matches the cell's actual voltage curve. It is not a firmware fault or a defective cell; it means the fuel gauge needs calibration cycles against the new chemistry. Discharge fully to hibernate cutoff two or three times with the charger disconnected, then recharge to 100% each time — the reported shutdown percentage will stabilise above 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409809440858,"sku":"BWCS-DE1546HB-1","price":129.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409809473626,"sku":"BWCS-DE1546HB-2","price":148.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409809506394,"sku":"BWCS-DE1546HB-3","price":164.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DE1546HB-1.webp?v=1779581042","url":"https:\/\/batteryweb.com\/products\/dell-inspiron-1564-replacement-battery-111v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}