MacBook Pro 15" Power consumption

What is the average power consumption of a MacBook Pro 15" please? I need to buy a battery backup to cater for power cuts.

Yes, you cannot partition the RAID, period, after creation.
The 2011 models and later have 6.0 Gb/s HDD interfaces with 3.0 Gb/s for the optical drive until after the 17" model, then 6.0 Gb/s on both interfaces. But no such support for the 2010 models like yours.
i honestly don't see the point of installing two large capacity SSDs for a RAID setup. I put smaller SSDs where the HDD was and a large HDD in place of the optical drive. I use the SSD for startup and the HDD for storage.

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