RAID Controller & Cache Batteries

A failing RAID controller battery (or cache battery) can put your server's data at risk by disabling the "write cache." We provide high-quality replacement batteries designed to keep your RAID card protected during power interruptions. Our selection includes exact-fit replacements for major server brands and controller models.

  • Data Protection: Ensures your cache data is saved if the power goes out.
  • Exact Replacements: Fits popular cards from IBM, Dell PERC, HP Smart Array, and Sun.
  • Warehouse Direct: Fresh stock ready for fast shipping to minimize server downtime.

A failing RAID controller battery (or cache battery) can put your server's data at risk by disabling the "write cache." We provide high-quality replacement batteries designed to keep your RAID card protected during power interruptions. Our selection includes exact-fit replacements for major server brands and controller models.

  • Data Protection: Ensures your cache data is saved if the power goes out.
  • Exact Replacements: Fits popular cards from IBM, Dell PERC, HP Smart Array, and Sun.
  • Warehouse Direct: Fresh stock ready for fast shipping to minimize server downtime.
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Replacement NetApp 271-00002 RAID Controller Battery (3.7 Volt, 5400 mAh)
Item #: CS-NTS302SL  |    

Replacement NetApp 271-00002 RAID Controller Battery (3.7 Volt, 5400 mAh)

Replacement NetApp 271-00002 RAID Controller Battery (3.7 Volt, 5400 mAh)

Item #: CS-NTS302SL
 
Voltage: 3.7 Volt / 5400 mAh
• Li-Ion
• Dimensions: 3.94" / 2.08" / 0.46"
• Weight: 0.33 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$31.95
Price: $31.95
QTY:
Replacement HP 120978-001 RAID Controller Battery (4.8 Volt, 250 mAh)
Item #: CS-RAC4200SL  |    

Replacement HP 120978-001 RAID Controller Battery (4.8 Volt, 250 mAh)

Replacement HP 120978-001 RAID Controller Battery (4.8 Volt, 250 mAh)

Item #: CS-RAC4200SL
 
Voltage: 4.8 Volt / 250 mAh
• NiMH
• Dimensions: 2.08" / 1.84" / 0.52"
• Weight: 0.31 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$37.95
Price: $37.95
QTY:
Replacement HP 307132-001 RAID Controller Battery (3.6 Volt, 500 mAh)
Item #: CS-RAC6400SL  |    

Replacement HP 307132-001 RAID Controller Battery (3.6 Volt, 500 mAh)

Replacement HP 307132-001 RAID Controller Battery (3.6 Volt, 500 mAh)

Item #: CS-RAC6400SL
 
Voltage: 3.6 Volt / 500 mAh
• NiMH
• Dimensions: 3.06" / 1.51" / 0.48"
• Weight: 0.18 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$24.95
Price: $24.95
QTY:
Replacement Dell G3399 RAID Controller Battery (3.7 Volt, 1250 mAh)
Item #: CS-RAD1850SL  |    

Replacement Dell G3399 RAID Controller Battery (3.7 Volt, 1250 mAh)

Replacement Dell G3399 RAID Controller Battery (3.7 Volt, 1250 mAh)

Item #: CS-RAD1850SL
 
Voltage: 3.7 Volt / 1250 mAh
• Li-Ion
• Dimensions: 2.00" / 1.43" / 0.24"
• Weight: 0.11 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$20.95
Price: $20.95
QTY:
Replacement Dell FR465 RAID Controller Battery (3.7 Volt, 1000 mAh)
Item #: CS-RAD1900SL  |    

Replacement Dell FR465 RAID Controller Battery (3.7 Volt, 1000 mAh)

Replacement Dell FR465 RAID Controller Battery (3.7 Volt, 1000 mAh)

Item #: CS-RAD1900SL
 
Voltage: 3.7 Volt / 1000 mAh
• Li-Ion
• Dimensions: 3.04" / 1.42" / 0.46"
• Weight: 0.16 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$25.95
Price: $25.95
QTY:
Replacement Dell 57DHN RAID Controller Battery (6 Volt, 1500 mAh)
Item #: CS-RAD2500SL  |    

Replacement Dell 57DHN RAID Controller Battery (6 Volt, 1500 mAh)

Replacement Dell 57DHN RAID Controller Battery (6 Volt, 1500 mAh)

Item #: CS-RAD2500SL
 
Voltage: 6 Volt / 1500 mAh
• NiMH
• Dimensions: 4.67" / 2.43" / 0.57"
• Weight: 0.44 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$25.95
Price: $25.95
QTY:
Replacement Dell 1K178 RAID Controller Battery (3.7 Volt, 1800 mAh)
Item #: CS-RAD2600SL  |    

Replacement Dell 1K178 RAID Controller Battery (3.7 Volt, 1800 mAh)

Replacement Dell 1K178 RAID Controller Battery (3.7 Volt, 1800 mAh)

Item #: CS-RAD2600SL
 
Voltage: 3.7 Volt / 1800 mAh
• Li-Ion
• Dimensions: 2.00" / 1.48" / 0.41"
• Weight: 0.14 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$20.95
Price: $20.95
QTY:
Replacement Dell 1242R RAID Controller Battery (6 Volt, 1500 mAh)
Item #: CS-RAD4400SL  |    

Replacement Dell 1242R RAID Controller Battery (6 Volt, 1500 mAh)

Replacement Dell 1242R RAID Controller Battery (6 Volt, 1500 mAh)

Item #: CS-RAD4400SL
 
Voltage: 6 Volt / 1500 mAh
• NiMH
• Dimensions: 4.24" / 3.49" / 0.58"
• Weight: 0.45 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$35.95
Price: $35.95
QTY:
Replacement Sun 371-2658 RAID Controller Battery (3.7 Volt, 1100 mAh)
Item #: CS-SBX625BU  |    

Replacement Sun 371-2658 RAID Controller Battery (3.7 Volt, 1100 mAh)

Replacement Sun 371-2658 RAID Controller Battery (3.7 Volt, 1100 mAh)

Item #: CS-SBX625BU
 
Voltage: 3.7 Volt / 1100 mAh
• Li-Ion
• Dimensions: 3.61" / 1.86" / 0.30"
• Weight: 0.15 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$31.95
Price: $31.95
QTY:
Replacement Dell 078-000-004 RAID Controller Battery (3.7 Volt, 2600 mAh)
Item #: CS-SNL400SL  |    

Replacement Dell 078-000-004 RAID Controller Battery (3.7 Volt, 2600 mAh)

Replacement Dell 078-000-004 RAID Controller Battery (3.7 Volt, 2600 mAh)

Item #: CS-SNL400SL
 
Voltage: 3.7 Volt / 2600 mAh
• Li-Ion
• Dimensions: 2.59" / 0.87" / 0.73"
• Weight: 0.23 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$21.95
Price: $21.95
QTY:
Replacement SUN ORACLE PBLC-11/5.4 RAID Controller Battery (5.4 Volt, )
Item #: CS-SUF371BU  |    

Replacement SUN ORACLE PBLC-11/5.4 RAID Controller Battery (5.4 Volt, )

Replacement SUN ORACLE PBLC-11/5.4 RAID Controller Battery (5.4 Volt, )

Item #: CS-SUF371BU
 
Voltage: 5.4 Volt
• HPC
• Dimensions: 1.30" / 1.02" / 0.51"
• Weight: 0.08 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$20.95
Price: $20.95
QTY:
Replacement Verizon 1100000712 RAID Controller Battery (4.5 Volt, 2900 mAh)
Item #: CS-VRZ712BU  |    

Replacement Verizon 1100000712 RAID Controller Battery (4.5 Volt, 2900 mAh)

Replacement Verizon 1100000712 RAID Controller Battery (4.5 Volt, 2900 mAh)

Item #: CS-VRZ712BU
 
Voltage: 4.5 Volt / 2900 mAh
• Lithium
• Dimensions: 2.07" / 1.69" / 0.59"
• Weight: 0.16 lbs
• Warranty: 1 Year
• See All Compatible Models
Price:
$28.95
Price: $28.95
QTY:

Protect Your Server Data with a Fresh Cache Battery

In most professional server environments, the RAID controller uses a "write-back" cache to improve performance. The cache battery (sometimes called a Battery Backup Unit or BBU) provides the emergency power needed to write that data to the disk if the main power fails. When these batteries age, they lose their ability to hold a charge, and your controller may automatically switch to a slower "write-through" mode to prevent data corruption. Replacing your RAID battery is a simple way to restore your server to its full operating speed.

Frequently Asked Questions

How do I know if my RAID battery is failing?

Most servers will trigger a "Predictive Failure" or "Battery Degraded" alert in the RAID management software (such as MegaRAID or HP Smart Storage Administrator). You may also notice a significant drop in server write performance, as the controller disables the cache for safety when the battery is weak.

Is it easy to replace a RAID card battery?

In most cases, yes. Most batteries are connected to the RAID controller via a small plastic clip and a short wire harness. Many are "hot-swappable" depending on your server chassis, but we always recommend checking your hardware manual before installation.

What common part numbers do you replace?

Our inventory covers a wide range of legacy and modern controller parts, including:

  • IBM: 571E, 44L0313, 22R2717, and 42R5070
  • Sun: 371-2658, 916C5940F
  • Dell/LSI: Various PERC and MegaRAID backup units
  • HP: Smart Array backup modules

How long do these batteries typically last?

Because server rooms are kept at consistent temperatures, these batteries usually last between 2 and 4 years. However, high-heat environments can shorten this lifespan. We recommend proactive replacement every 3 years to avoid emergency downtime.

Technical Cross-Reference Guide

If you are looking for a specific part number found on your current battery, we likely have the match. We stock replacements for 3HR-AAC, 190-3010-01, and 271-00011 units. Simply use the search bar or browse the listings above to find your specific voltage and mAh requirement.