MacBook Pro power drains in 10 minutes.

I bought my MacBook Pro in Aug 2011. Most of the times it is connected to the AC adapter and I rarely used the battery. Recently in an attempt to examine the battery health, I discovered that its battery could only last around 10 minutes. The power dropped rapidly, and in 10 minutes, the computer went into sleep mode due to battery running out. And charging is equally fast. I checked the system report, and it appears that the battery capacity is only 279 mAh. Does it mean that this bettery has reached its limit and I need to replace it? Cycle count is only 6 though.

Something happened with your battery, because its capacity is small and it's destroyed. Apart from that, System Information is notificating you that the battery must be replaced, so take the Mac to an Apple Store or reseller to get your battery replaced

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