{"product_id":"dell-poweredge-1900-replacement-battery-37v-1000mah-li-ion","title":"Dell PowerEdge 1900 RAID Battery FR465 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell PowerEdge 1900 \/ 1950 \/ 2900 \/ 2950 — 3.7V Li-ion RAID Controller Replacement Battery (FR465)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1000mAh Li-ion cell for Dell PowerEdge RAID controllers. It maintains write-cache memory during power loss, protecting data cached in the controller's DRAM until it can be flushed to disk. Fits PowerEdge 1900, 1950, 2900, and 2950, among others, using OEM part numbers FR465, FR463, P9110, U8735, and related variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePowerEdge PERC controller compatibility:\u003c\/strong\u003e\n    These PowerEdge servers share the same RAID controller battery footprint and BMS handshake across generations — the controller reads cell voltage and state-of-charge over a one-wire bus to calculate the backup window before enabling write-back mode.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against a PERC 5\/i controller. The BMS accepted the cell immediately at boot, reported healthy voltage, and placed the controller into a learn cycle — write-back mode was enabled after the cycle completed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eLearn cycle initialisation after swap:\u003c\/strong\u003e\n    After fitting this battery, trigger a learn cycle manually from the controller interface — StorCLI: \u003ccode\u003e\/cx bbu start learn\u003c\/code\u003e; ONTAP: \u003ccode\u003esystem controller battery show\u003c\/code\u003e. The controller holds in write-through mode until the learn cycle recalibrates the backup window estimate against the new cell. Skipping this step can leave write-through mode active for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRAID controller stuck in write-through mode after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PERC controller does not switch to write-back mode just because a new cell is installed. It requires a completed learn cycle — a full charge\/discharge pass — before it trusts the backup window estimate from the new cell. Until that cycle finishes, the controller treats the battery as uncalibrated and keeps write-through active as a precaution. On a lightly loaded server, the learn cycle can take 24–72 hours to complete under normal operation. Force it sooner with \u003ccode\u003eStorCLI \/cx bbu start learn\u003c\/code\u003e from the host OS.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eManagement console still reporting a battery error two days after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's RAID management layer runs its battery assessment on a timed schedule, not at boot — it does not re-evaluate the moment you install a new cell. If the previous battery flagged an error, that status persists in the controller log until the next scheduled assessment interval clears it. On PERC 5\/i and 6\/i controllers, this interval is typically 90 days from the last assessment, but can be reset by initiating a manual learn cycle. Run \u003ccode\u003eomreport storage battery\u003c\/code\u003e after the learn cycle completes to confirm the error clears and the backup window reads above 72 hours.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416092672090,"sku":"BWCS-RAD1900SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416092704858,"sku":"BWCS-RAD1900SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416092737626,"sku":"BWCS-RAD1900SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RAD1900SL-1.webp?v=1779760285","url":"https:\/\/batteryweb.com\/products\/dell-poweredge-1900-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}