RAID Controller & Cache Batteries

Q: How do I know if my RAID battery is failing?

Most servers trigger a 'Predictive Failure' or 'Battery Degraded' alert in RAID management software. You may also notice a drop in write performance, as the controller disables the cache when the battery is weak.

Q: Is it easy to replace a RAID card battery?

In most cases, yes. Most batteries connect via a small plastic clip and a short wire harness. Many are hot-swappable depending on the server chassis, though checking the hardware manual is recommended.

Q: What common part numbers do you replace?

Our inventory covers IBM (571E, 44L0313), Sun (371-2658), Dell/LSI (PERC/MegaRAID), and HP (Smart Array) backup modules.

Q: How long do these batteries typically last?

These batteries usually last between 2 and 4 years. High-heat environments can shorten this lifespan. Proactive replacement every 3 years is recommended to avoid emergency 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.

Narrow Your Results

Item #: CS-ABM600SL |

Replacement IBM 39R8812 RAID Controller Battery (3.7 Volt, 1800 mAh)

Item #: CS-ABM600SL

Voltage: 3.7 Volt / 1800 mAh

• Li-Ion
• Dimensions: 1.98" / 1.44" / 0.41"
• Weight: 0.14 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$26.95

Price: $26.95

Item #: CS-ARC612BU |

Replacement Areca ARC-6120BAT RAID Controller Battery (3.7 Volt, 1800 mAh)

Item #: CS-ARC612BU

Voltage: 3.7 Volt / 1800 mAh

• Li-Ion
• Dimensions: 2.05" / 1.45" / 0.42"
• Weight: 0.14 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$22.95

Price: $22.95

Item #: CS-AS2757SL |

Replacement IBM 53P0941 RAID Controller Battery (3.7 Volt, 3400 mAh)

Item #: CS-AS2757SL

Voltage: 3.7 Volt / 3400 mAh

• Li-Ion
• Dimensions: 3.09" / 2.07" / 0.46"
• Weight: 0.25 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$31.95

Price: $31.95

Item #: CS-AS2778SL |

Replacement IBM 44L0313 RAID Controller Battery (3.6 Volt, 2000 mAh)

Item #: CS-AS2778SL

Voltage: 3.6 Volt / 2000 mAh

• NiMH
• Dimensions: 2.01" / 1.72" / 0.57"
• Weight: 0.29 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$24.95

Price: $24.95

Item #: CS-AS2780SL |

Replacement IBM 97P4846 RAID Controller Battery (3.7 Volt, 3400 mAh)

Item #: CS-AS2780SL

Voltage: 3.7 Volt / 3400 mAh

• Li-Ion
• Dimensions: 2.63" / 1.96" / 0.41"
• Weight: 0.22 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$23.95

Price: $23.95

Item #: CS-AS400SL |

Replacement IBM 44L0305 RAID Controller Battery (3.6 Volt, 800 mAh)

Item #: CS-AS400SL

Voltage: 3.6 Volt / 800 mAh

• NiMH
• Dimensions: 1.77" / 1.26" / 0.39"
• Weight: 0.13 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$19.95

Price: $19.95

Item #: CS-ASM500SL |

Replacement IBM 46M0917 RAID Controller Battery (3.7 Volt, 1500 mAh)

Item #: CS-ASM500SL

Voltage: 3.7 Volt / 1500 mAh

• Li-Ion
• Dimensions: 3.00" / 2.11" / 0.59"
• Weight: 0.21 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$52.95

Price: $52.95

Item #: CS-BBU95SL |

Replacement 3WARE 190-3010-01 RAID Controller Battery (3.7 Volt, 1800 mAh)

Item #: CS-BBU95SL

Voltage: 3.7 Volt / 1800 mAh

• Li-Ion
• Dimensions: 1.99" / 1.42" / 0.41"
• Weight: 0.14 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$20.95

Price: $20.95

Item #: CS-DEK850BU |

Replacement Dell 078-000-136-04 RAID Controller Battery (3.7 Volt, 2500 mAh)

Item #: CS-DEK850BU

Voltage: 3.7 Volt / 2500 mAh

• Li-Ion
• Dimensions: 3.12" / 1.43" / 0.73"
• Weight: 0.28 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$42.95

Price: $42.95

Item #: CS-DEM620BU |

Replacement Dell 7VJMH RAID Controller Battery (3.7 Volt, 830 mAh)

Item #: CS-DEM620BU

Voltage: 3.7 Volt / 830 mAh

• Li-Ion
• Dimensions: 1.82" / 1.43" / 0.20"
• Weight: 0.09 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$19.95

Price: $19.95

Item #: CS-GIC573SL |

Replacement Gigabyte WDM060602573 RAID Controller Battery (3.7 Volt, 1400 mAh)

Item #: CS-GIC573SL

Voltage: 3.7 Volt / 1400 mAh

• Li-Ion
• Dimensions: 1.99" / 1.19" / 0.41"
• Weight: 0.13 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$20.95

Price: $20.95

Item #: CS-HDL160BU |

Replacement HP 727258-B21 RAID Controller Battery (7.2 Volt, 1000 mAh)

Item #: CS-HDL160BU

Voltage: 7.2 Volt / 1000 mAh

• Li-Ion
• Dimensions: 5.55" / 1.19" / 0.78"
• Weight: 0.58 lbs
• Warranty: 1 Year
• See All Compatible Models

Price:
$66.95

Price: $66.95

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.