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I Have a MacBook Pro (13-inch, Mid 2009). Now the battery status is "Service Battery". I'm thinking of getting a new Laptop.

My question is can I use my laptop even battery is dead by plugged in?

Or

Should I change my Battery?

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You can continue to use your MacBook Pro by always having it plugged into mains power. This approach will work and work well.

I use an older MacBook showing "Service Battery" at home. It is always plugged into mains power. The computer works well and does everything my family need of it.

Ask Apple for a Quote

Before buying a new laptop, ask Apple how much a new battery would cost. The cost will be significantly lower than a brand new computer.

Replace the Battery Yourself

Alternatively, iFix provide instructions for replacing the battery yourself but Apple do not recommend this. Apple do not recommend this because incorrectly fitted batteries can be dangerous and they can be a fire hazard.

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    Thanks, I'm gonna buy a new Macbook Pro later this year so I will use by plugged in always. – Karthikeyan Vaithilingam Mar 6 '16 at 9:52
  • Because it's an old device, I'd recommend the iFixit route; get the battery plus the weird "Tri-point Y1 Screwdriver" and you're set. Do note that if you plan to do a fresh OS install then the battery replacement will reset the MacBook's real time clock, and this will cause crypto-related problems during the install. My advice is to replace the battery and boot the machine with the old OS, then re-install. – kahara Mar 6 '16 at 14:08
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Yes, laptop will be still working. As soon as you power it off, then the battery will not keep the charge, it may be some minutes...

Battery is kind of expensive part to replace, so to buy a new laptop would be not so bad idea.

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Same happened to me. The battery went very bad (bloated). I just removed it and ran Macbook Pro without it.

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