{"product_id":"dell-emc-isilon-nl410-replacement-battery-37v-2600mah-li-ion","title":"Dell EMC Isilon NL410 RAID Battery 078-000-004 3.7V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell EMC Isilon NL410 \/ S210 \/ X-Series — 3.7V Li-ion RAID Controller Backup Battery (078-000-004)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2600mAh (9.62Wh) lithium-ion cell is the backup battery for the RAID controller in Dell EMC Isilon NL410, S210, X200, and X400 storage nodes. It holds controller cache during a power loss event, giving the system time to flush write-pending data and shut down cleanly. Without a functional cell, the controller drops to write-through mode and cache protection is gone.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNL410, S210, X200, X400 compatibility:\u003c\/strong\u003e\n    These Isilon nodes share the same controller board architecture and use the same 3.7V cell with OEM part numbers 078-000-004, 415-0021-01, and 078-000-015-00. The BMS handshake and connector are identical across this generation of nodes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, discharge, and BMS communication checks. The controller recognised the cell, initiated the learn cycle handshake, and reported battery status correctly through the management interface.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eLearn cycle initialisation after swap:\u003c\/strong\u003e\n    After fitting this cell, trigger the battery learn cycle from the controller interface — on ONTAP use \u003ccode\u003esystem controller battery show\u003c\/code\u003e, on StorCLI use \u003ccode\u003e\/cx bbu show\u003c\/code\u003e. The controller stays in write-through mode until the learn cycle completes and recalibrates the backup window 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\"\u003eFitting a new cell does not automatically return the controller to write-back mode. The controller must complete a full learn cycle — charge, discharge, and recharge — before it recalculates the backup window and re-enables write-back caching. This cycle typically takes 24 to 72 hours under normal system load. Until the cycle finishes, the controller intentionally holds write-through mode to protect data. Check cycle status with \u003ccode\u003esystem controller battery show\u003c\/code\u003e on ONTAP or StorCLI \u003ccode\u003e\/cx bbu show\u003c\/code\u003e on LSI-based controllers.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eManagement console reporting a battery error days after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIsilon controllers run scheduled battery self-assessments on a timed interval — not at boot and not immediately after a swap. If the first scheduled assessment runs before the learn cycle has fully completed, the controller logs a battery error or flags the backup window as unknown. This is a timing issue, not a cell fault. Wait for the learn cycle to finish, then check whether the error clears on the next scheduled assessment cycle. If the error persists after 72 hours and a completed learn cycle, verify cell voltage is at or above 3.6V with a multimeter before assuming a defective unit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416089264218,"sku":"BWCS-SNL400SL-1","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416089296986,"sku":"BWCS-SNL400SL-2","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416089329754,"sku":"BWCS-SNL400SL-3","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SNL400SL-1.webp?v=1779760241","url":"https:\/\/batteryweb.com\/products\/dell-emc-isilon-nl410-replacement-battery-37v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}