{"product_id":"acer-aspire-7520-replacement-battery-148v-4400mah-li-ion","title":"Acer Aspire 7520 AS07B32 Replacement Battery 14.8V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Aspire 7520 Series — 14.8V Li-ion Replacement Battery (AS07B32)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4400mAh (65.12Wh) Li-ion replacement battery for the Acer Aspire 7520 and a broad range of Aspire 5920G, 6920, and 8920G notebooks. It replaces OEM part numbers including AS07B32, AS07B42, AS07B72, and BT.00804.024, among others. Install it when the original cell no longer holds charge or the laptop won't run off AC disconnect.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAspire 5920G, 6920, 7520, 8920G compatibility:\u003c\/strong\u003e\n    These models share the same 14.8V four-cell battery bay, connector pinout, and BMS handshake protocol. A single cell SKU covers all of them because the charge controller expects the same voltage rail and communication signal across the series.\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 an Aspire 7520 chassis. The BMS negotiated correctly with the EC firmware, charge current stepped down at the expected threshold, and the cell reached full capacity without triggering a protection trip.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration on Aspire notebooks:\u003c\/strong\u003e\n    After fitting this cell, run the laptop on battery until it hits hibernate cutoff — do not interrupt it. Then charge uninterrupted to 100%. 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.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Aspire 7520 BIOS reports poor battery health after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Aspire EC reads health data from the EEPROM on the old cell and caches it. When a new cell is fitted, that cached data doesn't automatically clear — so the BIOS still reports degraded health figures from the previous battery. This isn't a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the EC to rewrite its stored health registers against the new cell's actual readings. After one or two cycles, the health report normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on Aspire 7520\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom usually means the fuel gauge IC hasn't calibrated against the new cell yet — its charge map still reflects the old, degraded cell's voltage curve. Under full CPU and display load, actual cell voltage drops faster than the gauge predicts, and the EC triggers a hard shutdown before the displayed percentage reaches zero. It's not a cell fault. Run two full discharge-to-hibernate and full-charge cycles without interruption. After that, the fuel gauge IC recalibrates its curve and the shutdown point drops back to the correct low-voltage cutoff near 10–11V pack voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410864537690,"sku":"BWCS-AC5520NB-1","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410864570458,"sku":"BWCS-AC5520NB-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410864603226,"sku":"BWCS-AC5520NB-3","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC5520NB-1.webp?v=1779581401","url":"https:\/\/batteryweb.com\/products\/acer-aspire-7520-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}