Dell 44V3696 RAID Controller Replacement Battery 3.6V 800mAh
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Dell 44V3696 RAID Controller Replacement Battery 3.6V 800mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
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Delivery and Shipping
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Disclaimer
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Dell 44V3696 RAID Controller Replacement Battery 3.6V 800mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.6V
Amp
800mAh
Dell RAID Controller Cache Battery — 3.6V Ni-MH Replacement Battery (44V3696)
This is a 3.6V 800mAh Ni-MH replacement battery for Dell RAID controller cache backup circuits. It replaces OEM part numbers 44V3696, 44H8429, and 09L5609. When main power fails, this cell maintains the controller's write cache so queued data is not lost before the host system recovers.
- RAID cache backup role: These part numbers share a common voltage rail and connector footprint used across several Dell RAID controller generations. The BMS handshake confirms cell chemistry and state-of-charge before the controller transitions from write-through to write-back mode. A mismatched or unrecognised cell keeps the controller in write-through permanently.
- Bench tested on actual hardware: We ran this cell through charge acceptance and discharge profiling on a RAID controller bench rig. The BMS accepted the cell, completed charge termination cleanly at delta-V cutoff, and reported state-of-charge within the expected window for Ni-MH at this capacity.
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Learn cycle after installation:
After fitting this cell, initiate the battery learn cycle from your controller management interface — StorCLI:
storcli /cx bbu start learn, or ONTAP:system controller battery show. The controller stays in write-through mode until the learn cycle completes and recalibrates the backup window estimate against the new cell. This takes 24–72 hours under normal load.
RAID controller staying in write-through mode after battery swap
Write-through mode locks in when the controller has not completed a learn cycle against the new cell. Swapping the battery resets the backup window estimate to zero — the controller will not re-enable write-back until it confirms the cell can sustain the cache across a full discharge and recharge cycle. This is a protection behaviour, not a fault. Trigger the learn cycle manually via StorCLI: storcli /cx bbu start learn and allow the cycle to run without interruption.
Management console showing a battery error days after installation
Most Dell RAID controllers run their battery assessment on a timed schedule — not at boot, and not immediately after a swap. If the scheduled self-test runs before the learn cycle is complete, the controller logs a battery error because the backup window estimate is still uncalibrated. The error clears once the learn cycle finishes and the controller recalculates the window with real discharge data. Check status in StorCLI using storcli /cx bbu show and confirm the learn cycle state shows "Active" or "Complete" before treating the error as a hardware fault.
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Dell
- Manufacturer: CS
- Series: Standard
- Color: Green
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My RAID controller went back to write-through mode the moment I swapped the battery — is the new cell faulty?
The cell is almost certainly fine. The controller resets its backup window estimate to zero on every battery swap and will not re-enable write-back until a learn cycle confirms the new cell's capacity. This is normal protective behaviour, not a sign of a bad cell. Run storcli /cx bbu start learn and let the cycle complete — write-back mode returns automatically once the calibration finishes, typically within 24–72 hours.
The backup window is showing shorter than it should be — should I be worried about this cell?
A shortened backup window on the first report after a swap is expected. The controller's estimate is based on its last completed learn cycle, which was calibrated against the old, degraded cell. The new Ni-MH cell's actual capacity recalibrates over two to three full learn cycles. Check the window figure again after the second completed cycle using storcli /cx bbu show all — the reported duration should increase as the controller builds an accurate discharge profile against the 800mAh cell.
The NVDIMM module is flagging a battery alarm on every reboot since the swap — what's happening?
NVDIMM modules validate cell voltage range at every boot as part of their data-retention check. Immediately after a swap, the cell's resting voltage may sit outside the module's expected window if it hasn't completed a full charge cycle yet. Let the controller fully charge the new cell before the next planned reboot — on a Ni-MH cell at 3.6V, full charge termination at delta-V cutoff typically takes several hours. If the alarm persists after a confirmed full charge, check that the replacement part number matches one of the three OEM references: 44V3696, 44H8429, or 09L5609.
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