{"product_id":"acro-vesta-586-replacement-battery-108v-4000mah-ni-mh","title":"ACRO Vesta 586 Replacement Battery 10.8V 4000mAh DR35","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eACRO Vesta 586 — 10.8V Ni-MH Replacement Battery (DR35)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 4000mAh Ni-MH replacement battery for the ACRO Vesta 586 notebook. It fits directly in place of OEM part numbers DR35, DR35AA, and DR35S. Capacity is 43.2Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVesta 586 fit confirmation:\u003c\/strong\u003e\n    The DR35 family shares a common connector pinout and voltage rail across Vesta 586 variants. The BIOS reads cell chemistry and capacity via the SMBus line — this cell communicates correctly on that bus, so the system recognises it without prompting a hardware error at POST.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and controlled discharge on a Vesta 586 unit. The BMS held charge termination cleanly at capacity peak, and the SMBus reported cell voltage within 0.1V of nominal throughout the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on Ni-MH cells:\u003c\/strong\u003e\n    After installing, run the laptop on battery until it hibernates at low-battery cutoff, then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate capacity or 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\"\u003eBIOS reporting battery health as poor after installing a new DR35 cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Vesta 586 BIOS stores learned capacity data from the previous cell in EEPROM. When a new cell goes in, that stored data no longer matches the actual cell state, so the system flags poor health immediately. This is not a fault with the replacement — it is stale data. Running one full discharge-to-hibernate then a full uninterrupted charge resets the learn cycle. After two or three calibration cycles, the health indicator returns to normal and the reported Wh rating aligns with the actual 43.2Wh cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% battery shown on a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells have a steeper voltage cliff under full CPU and display load than the fuel gauge IC anticipates before calibration. The system reads remaining charge from a voltage curve that was mapped to the old, degraded cell — so the percentage shown is wrong. When the new cell hits a load spike, voltage drops faster than predicted and the OS triggers emergency shutdown before the gauge catches up. Fix this by completing two full discharge-to-hibernate and full-charge cycles so the fuel gauge IC re-maps its curve against the actual DR35 cell voltage profile.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410859851866,"sku":"BWCS-DR35HB-1","price":84.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410859884634,"sku":"BWCS-DR35HB-2","price":100.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410859917402,"sku":"BWCS-DR35HB-3","price":111.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DR35HB-big.webp?v=1779581376","url":"https:\/\/batteryweb.com\/products\/acro-vesta-586-replacement-battery-108v-4000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}