Replacement for 380566-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 380566-B21 (380566-B21 - Compaq Single External Cache Battery)? Pro Disk Network ships drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the 380566-B21
| SKU | 380566-B21 |
|---|---|
| Product | 380566-B21 - Compaq Single External Cache Battery |
| Current price | $477.68 |
| Stock status | In Stock |
| Detail page | View 380566-B21 › |
Drop-in replacements for 380566-B21
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
F5U218-MOB - Belkin USB 2.0 4-Port Thumb Hub - 4 x 4-pin Type A USB 2.0 External 1 x 4-pin Type A USB 2.0 External - External
SKU: F5U218-MOB
Price: $499.42
280129-B31 - Compaq StorageWorks External DLT Tape Drive - 40GB (Native)/80GB (Compressed) - External
SKU: 280129-B31
Price: $620.66
249160-B31 - Compaq AIT External Tape Drive - 100GB (Native)/200GB (Compressed) - External
SKU: 249160-B31
Price: $629.63
70-33547-S2 - HP External Cache Battery Module with Battery for StorageWorks EMA16000
SKU: 70-33547-S2
Price: $695.91
J8169-61001 - HP 816-Watts Redundant External Power Supply 4-Output Connectors External Rack-Mountable for Procurve E610
SKU: J8169-61001
Price: $145.89
J8169-69001 - HP 816-Watts Redundant External Power Supply 4-Output Connectors External Rack-Mountable for Procurve E610
SKU: J8169-69001
Price: $145.89
2065200EU-R - Adaptec FireConnect 8300 3 Port FireWire Adapter - 2 x 9-pin IEEE 1394b FireWire External 1 x 6-pin IEEE 1394a FireWire External - Plug-in
SKU: 2065200EU-R
Price: $289.08
CBL-SAST-0573 Supermicro CBL-SAST-0573 1.0m External Mini-SAS HD to External Mini-SAS HD Cable
SKU: CBL-SAST-0573
Price: $290.66
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.