Dell R510 controller battery need to replace

please advice what is the impact if the controller battery is faulty because our server hardware log controller battery have problem and need to replace .
YaYangTeahAsked:
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rindiCommented:
The cache may not work properly, which means the array can be slower. Often you can't upgrade the firmware if the battery isn't OK. Power failures could cause disk corruption (but that shouldn't be the case as with a spent battery, the write back cache is normally automatically disabled).
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andyalderSaggar maker's framemakerCommented:
NU209=$40
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