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Chapter 2. Batteries
2.1. Requirements for DE6400 or DE6600 battery replacement
Before you replace a DE6400 or DE6600 battery, review the requirements and
considerations.
A battery is included with a controller and preserves cached data if the AC power fails.
2.1.1. Recovery Guru alerts
If the Recovery Guru in ThinkSystem System Manager reports one of following statuses, you must
replace the affected battery:
• Battery Failed
• Battery Replacement Required
From ThinkSystem System Manager, review the details in the Recovery Guru to confirm that there
is an issue with a battery and to ensure no other items must be addressed first.
2.1.2. Procedure overview
To protect your data, you must replace a failed battery as soon as possible.
The following is an overview of the steps to replace a battery in DE6400 or DE6600 controllers:
1. Take controller offline.
2. Remove the controller canister.
3. Replace the battery.
4. Replace the controller canister.
5. Bring the controller online.
2.1.3. Requirements
If you plan to replace a battery, you must have:
• A replacement battery.
• An ESD wristband, or you have taken other antistatic precautions.
• Labels to identify each cable that is connected to the controller canister.
• A management station with a browser that can access ThinkSystem System Manager for the
controller. (To open the System Manager interface, point the browser to the controller's domain
name or IP address.)
Optionally, you can use the command line interface (CLI) to perform some of the procedures. If
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