{"product_id":"acer-aspire-r7-replacement-battery-152v-3500mah-li-ion","title":"AL13B3K Acer Aspire R7 Replacement Battery 15.2V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Aspire R7-571 \/ M5-583 Series — 15.2V Li-ion Replacement Battery (AL13B3K)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 3500mAh (53.2Wh) Li-ion battery for the Acer Aspire R7, R7-571, R7-571G, and M5-583 series convertible notebooks. It replaces OEM part numbers AL13B3K, KT.00403.013, AP13B3K, AP13B8K, AC13B8K, and related variants. The connector and BMS handshake match the original 4-cell configuration these models shipped with.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eR7 and M5-583 cell compatibility:\u003c\/strong\u003e\n    These models share a 4-cell 15.2V architecture with the same connector pinout and BMS communication protocol. A single replacement covers both lines without adapter or firmware workaround.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an R7-571 chassis and monitored the BMS handshake through full charge and discharge cycles. The protection circuit responded correctly to over-voltage and thermal thresholds — no false cutoffs observed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the R7 hinge platform:\u003c\/strong\u003e\n    After fitting, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. The Aspire R7's BIOS uses a battery learn cycle — skipping this step leaves the fuel gauge IC uncalibrated and triggers a false low-health warning in the system tray.\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 the AL13B3K\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Acer Aspire R7 BIOS reads health data from EEPROM embedded in the battery pack. A new cell ships with factory EEPROM values that do not match the charge history the BIOS expects to see. The system interprets this mismatch as a degraded cell, not a new one. One full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the learn cycle and clears the warning without any BIOS update or driver change.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAspire R7 shutting down abruptly when the gauge reads 20–25% remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff failure — the cell voltage drops below the BMS cutoff threshold under combined CPU and display load before the fuel gauge reaches zero. It happens because the gauge IC was calibrated against the old cell's discharge curve, not the new one. The fix is the same calibration cycle: drain fully to hibernate-cutoff, then charge to 100% without interruption. After two complete cycles the gauge IC maps accurately to the new cell and the premature shutdowns stop. Target full-charge resting voltage is 16.8V across the pack terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409787617370,"sku":"BWCS-ACR700NB-1","price":110.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409787650138,"sku":"BWCS-ACR700NB-2","price":125.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409787682906,"sku":"BWCS-ACR700NB-3","price":137.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACR700NB-1.webp?v=1779580870","url":"https:\/\/batteryweb.com\/products\/acer-aspire-r7-replacement-battery-152v-3500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}