Verizon 1100000712 RAID Controller Replacement Battery 4.5V 2900mAh

Verizon 1100000712 — 4.5V Lithium Replacement Battery (1100000712)

This 4.5V, 2900mAh lithium cell replaces the backup battery in the Verizon RAID controller model 1100000712. It maintains cache power during unexpected outages, allowing the controller to complete write operations and protect against data corruption. Swap it in when the controller drops to write-through mode or the management console flags a battery fault.

• RAID cache backup application: The 1100000712 controller uses this cell to hold volatile cache contents long enough for a safe shutdown sequence. The battery must meet the voltage floor the BMS checks on every boot — a degraded cell that sags below threshold triggers write-through mode regardless of remaining capacity.
• Bench tested on actual hardware: We ran charge and discharge cycles on this cell and confirmed the BMS handshake completes correctly. The cell reaches full charge without tripping over-voltage cutoff, and discharge curves stay within the controller's expected window.
• Learn cycle initiation after swap: After fitting this battery, trigger the learn cycle from the controller management interface — on ONTAP use system controller battery show; on Broadcom/LSI controllers use StorCLI /cx bbu show. The controller stays in write-through mode until the learn cycle runs and recalibrates the backup window estimate against the new cell's actual capacity.

RAID controller staying in write-through mode after battery swap

Write-through mode is not a fault — it is the controller's default state when the backup window has not been verified. Fitting a new cell does not automatically trigger recalibration. The controller requires a completed learn cycle before it trusts the backup window estimate and re-enables write-back caching. Kick off the learn cycle manually via StorCLI or ONTAP and allow 24–72 hours for it to finish under normal load.

Management console showing a battery error days after installation

The controller runs its battery self-assessment on a timed schedule, not at the moment of installation. If the scheduled test fires before the learn cycle completes, the controller reports the battery as unverified or faulted — even on a healthy new cell. This is not a defective battery. Wait for the learn cycle to finish, then allow one full scheduled assessment cycle to clear the error from the console.