{"product_id":"sun-blade-raid-card-5-replacement-battery-37v-1100mah-li-ion","title":"Sun Blade Raid Card 5 371-2658 Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSun Blade RAID Card 5 — 3.7V Li-ion Replacement Battery (371-2658)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1100mAh (4.07Wh) Li-ion cell replaces the backup cache battery on the Sun Blade RAID Card 5, Blade X6250, and Xeon E5450 controller platforms. It maintains volatile write-cache memory during a power loss event, allowing cached writes to complete safely to disk. Without a functional backup cell, the controller drops to write-through mode and cache protection is lost.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBlade RAID Card 5 \/ X6250 compatibility:\u003c\/strong\u003e\n    These platforms share the same battery connector, voltage rail, and BMS handshake protocol, all referencing OEM part 371-2658 (cross-referenced as SQU-711 and 916C5940F). The controller's BMS communicates directly with the cell over a dedicated SMBus line to track state-of-charge and backup window estimates.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the RAID controller's learn sequence and confirmed the BMS completed a full charge-to-discharge calibration pass. The controller transitioned from write-through to write-back mode once the backup window estimate exceeded the controller's minimum threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap learn cycle initiation:\u003c\/strong\u003e\n    After fitting this cell, run the battery learn cycle from the controller's management interface — on ONTAP use \u003ccode\u003esystem controller battery show\u003c\/code\u003e; on Broadcom\/LSI use \u003ccode\u003eStorCLI \/cx bbu show\u003c\/code\u003e. The controller will remain in write-through mode until the learn cycle completes and the new cell's backup window is recalibrated. This typically takes 24–72 hours under normal server load.\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 physical cell does not automatically trigger recalibration. The controller's BMS must complete a full learn cycle — a controlled charge and discharge pass — before it will calculate a valid backup window for the new cell. Until that window meets the controller's minimum threshold (typically 72 seconds of hold time at operating voltage), write-back mode stays locked out. Manually trigger the learn cycle via StorCLI or ONTAP rather than waiting for the next scheduled assessment.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eManagement console showing battery error days after the swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe controller does not re-assess battery health at boot — it runs a scheduled assessment on a timed interval, often 24 to 90 days depending on firmware. If the console reports a battery error shortly after installation, that alert is likely carried over from the degraded original cell and has not yet been cleared by a fresh assessment cycle. Force a new assessment via \u003ccode\u003eStorCLI \/cx bbu startlearning\u003c\/code\u003e or the equivalent ONTAP command. Once the learn cycle completes and the BMS logs a valid backup window, the error clears automatically.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416091099226,"sku":"BWCS-SBX625BU-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416091131994,"sku":"BWCS-SBX625BU-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416091164762,"sku":"BWCS-SBX625BU-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBX625BU-1.webp?v=1779760241","url":"https:\/\/batteryweb.com\/products\/sun-blade-raid-card-5-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}