{"product_id":"acer-aspire-7520-replacement-battery-111v-8800mah-li-ion","title":"Acer Aspire 7520 Compatible Battery 11.1V 8800mAh AS07B32","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Aspire 7520 — 11.1V Li-ion Replacement Battery (AS07B32)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 8800mAh Li-ion replacement battery for the Acer Aspire 7520 and a wide range of Aspire 5920G, 6920, and 8920G series laptops. It cross-references over 30 OEM part numbers including AS07B42, AS07B52, AS07B72, and BT.00807.014. Capacity is 97.68Wh — higher cell count than the stock 4400mAh packs shipped with some units.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAspire 7520 \/ 5920G \/ 8920G series fitment:\u003c\/strong\u003e\n    These models share the same 11.1V three-cell-series architecture, identical connector pinout, and a common BMS communication protocol over the SMBus line. One cell pack fits the full platform without firmware conflicts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an Aspire 7520 and an 8920G unit. The BMS handshook within two minutes of insertion, charge current ramped correctly through CC and CV phases, and the protection circuit tripped cleanly at under-voltage during a full discharge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle reset on Acer Aspire units:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff on battery only — no AC during discharge — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data 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 platform stores learned capacity data in EEPROM on the battery's BMS board. When a new cell is installed, the BIOS reads residual EEPROM values from the old pack and flags a health mismatch — even when the replacement cell is electrically sound. This is not a fault with the new battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn cycle data. After two to three complete cycles, the BIOS health indicator will reflect actual cell capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAspire 7520 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 has not yet calibrated against the new cell's voltage curve. The gauge predicts remaining charge using data from the degraded original cell, so it misreads the voltage cliff where the new cell still has capacity. Under combined CPU and display load, voltage sag can also push the cell below the BMS cutoff threshold before the gauge reaches 0%. Discharge fully to hibernate cutoff twice in succession — this recalibrates the fuel gauge IC to the replacement cell's actual voltage profile. After recalibration, the shutdown point should align with 5% or below.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409825759322,"sku":"BWCS-AC5520HB-1","price":133.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409825792090,"sku":"BWCS-AC5520HB-2","price":153.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409825824858,"sku":"BWCS-AC5520HB-3","price":169.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC5520HB-1.webp?v=1779581091","url":"https:\/\/batteryweb.com\/products\/acer-aspire-7520-replacement-battery-111v-8800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}