RAID Controller & Cache Batteries

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.