{"product_id":"netapp-replacement-battery-72v-3400mah-li-ion","title":"NetApp 271-00024 RAID Controller Replacement Battery 7.2V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNetApp 271-00024 — 7.2V Li-ion Replacement Battery (271-00024)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.2V, 3400mAh Li-ion cell replaces the backup power unit in NetApp RAID controller cache protection modules. It holds controller cache during unexpected power loss, allowing a clean flush to non-volatile storage before the system goes dark. Part numbers 271-00024, 271-00024+C0, and ES3242 all cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCache backup module compatibility:\u003c\/strong\u003e\n    NetApp's RAID controller backup power units share a fixed 7.2V rail and a standardised BMS handshake across the 271-00024 platform. The controller verifies cell voltage on every boot cycle before enabling write-back cache — voltage outside the accepted window keeps the controller in write-through mode regardless of cell condition.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge and controlled discharge on a RAID controller backup module. The BMS accepted the cell, reported healthy status, and completed the learn cycle without flagging a fault. Capacity read back within 3% of the 3400mAh rating at the end of the calibration discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eLearn cycle initiation after swap:\u003c\/strong\u003e\n    After installing this cell, trigger the battery learn cycle from your management interface — in ONTAP use \u003ccode\u003esystem controller battery show\u003c\/code\u003e, or via StorCLI run \u003ccode\u003e\/cx bbu show\u003c\/code\u003e. The controller stays in write-through mode until the learn cycle finishes and posts a verified backup window estimate against this 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\"\u003eA freshly installed cell does not automatically unlock write-back cache. The controller holds write-through mode until it has completed a full learn cycle and confirmed the backup window meets its minimum threshold. On NetApp systems, this calibration typically takes 24 to 72 hours under normal I\/O load. Until the learn cycle posts a passing result, the controller treats the new cell as unverified and keeps write-back disabled as a data protection measure.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eONTAP reporting a battery error days after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNetApp's battery assessment does not run at the moment of installation — it runs on a scheduled interval tied to the controller's internal clock. If the first scheduled assessment fires before the learn cycle has completed, ONTAP will log a battery error even on a healthy cell. Let the learn cycle finish fully before treating a console error as a genuine fault. Once the cycle completes and backup window data is posted, re-check with \u003ccode\u003esystem controller battery show\u003c\/code\u003e — a passing result clears the error.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416090706010,"sku":"BWCS-NEX910BU-1","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416090738778,"sku":"BWCS-NEX910BU-2","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416090771546,"sku":"BWCS-NEX910BU-3","price":85.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NEX910BU-1.webp?v=1779760241","url":"https:\/\/batteryweb.com\/products\/netapp-replacement-battery-72v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}