{"product_id":"areca-arc-11xxml-replacement-battery-37v-1800mah-li-ion","title":"Areca ARC-6120BAT RAID Controller Replacement Battery 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAreca ARC-11xx \/ ARC-12xx \/ ARC-1680\/1880 Series — 3.7V Li-ion Replacement Battery (ARC-6120BAT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1800mAh Li-ion cell replaces the backup power module on Areca RAID controllers across the ARC-11xx(ML), ARC-12xx(ML), ARC-12xx(4i\/4x\/8x), and ARC-1680\/1880 (I\/X\/LP\/IX) series. When mains power drops, this battery holds the controller's write cache long enough for a graceful flush to disk. Without a functioning cell, the controller falls back to write-through mode permanently and cache data is at risk.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-series fit — ARC-11xx through ARC-1880:\u003c\/strong\u003e\n    Areca standardised on the ARC-6120BAT footprint across multiple controller generations. All listed models share the same 3.7V rail, connector pinout, and BMS handshake protocol, which is why one cell covers such a wide compatibility range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under simulated cache-hold conditions and confirmed the BMS communicates state-of-charge correctly to the controller. The controller recognised the new cell and queued a learn cycle without manual intervention on the ARC-1880.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eLearn cycle initiation after swap:\u003c\/strong\u003e\n    After fitting the new cell, initiate a battery learn cycle from your controller's management interface — StorCLI: \u003ccode\u003estorcli \/cx bbu start learn\u003c\/code\u003e, or via the Areca web GUI under Battery Information. The controller stays in write-through mode until the learn cycle completes and recalibrates the backup window estimate against the new cell's actual capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRAID controller staying in write-through mode after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSwapping the cell does not automatically restore write-back mode. The controller holds write-through until it has a verified backup window figure from a completed learn cycle. On Areca controllers, the learn cycle runs a full discharge-and-charge sequence, which can take 24–72 hours depending on system load. Until that cycle finishes, write-back mode remains locked out regardless of how healthy the new cell is.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eManagement console showing a battery error days after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAreca controllers run their battery health assessment on a timed interval, not at boot — so the first scheduled test may not execute until 24–72 hours post-installation. If the console flags a battery error during that window, check whether the learn cycle has actually completed by reviewing the Battery Information page in the Areca web GUI. A \"Charging\" or \"Learn\" status means the assessment is still running, not that the cell is faulty. Wait for the cycle to finish before treating the error as a hardware fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416089362522,"sku":"BWCS-ARC612BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416089395290,"sku":"BWCS-ARC612BU-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416089428058,"sku":"BWCS-ARC612BU-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ARC612BU-1.webp?v=1779760223","url":"https:\/\/batteryweb.com\/products\/areca-arc-11xxml-replacement-battery-37v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}