Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: I purchased this battery and want to know why does  my macbook say  service battery after i put a new this new one in?  Even after it is charged.
Document: This is the second knock off battery I have purchased for my 2008 white 13.3 macbook. The first one, I'm embarrassed to say, I paid eighty bucks for but that was not from Amazon. It lasted me about a year and it began to bulge out as other have described and then stopped holding a charge. Even when it was brand new, 3 hours was about the max charge time it would hold.I've had this replacement for about 2 weeks not.
I purchased one of these batteries in the fall, as my factory battery was failing, and I was reluctant to spend over $100 on a 5 year old laptop. When the replacement battery arrived, I installed it and all was right with the world. Well, at least until morning. Overnight my MacBook decided it did not want to recognize the battery.Like some reviewers, I found that hot swapping the battery could work, but even then performance was flaky.
I actually purchased a new Mac but thought this battery would be an inexpensive way to have the old one as an extra computer for some work I need to do.Battery arrived promptly with "Free Shipping" since I ordered with another product. Installed just fine in my Late 2007 13" MacBook. Faithfully cycled battery 6 times. I still can't get past the "Service Battery" warning message.
As soon as I unpacked this and put it in, I got the message &#34;Service Battery&#34; which according to online help groups and my Mac, means I have to bring it into an Apple store. It seems to be working okay, but I do not know exactly what the message means or if it is damaging my computer in any way. DIsappointed.
I needed to be mobile at that point, so I closed the lid and took the system with me, but as a precaution I also put the warped-but-working OEM battery, which was about 50% charged at the time I swapped in the new one the previous evening, into the plastic antistatic bag the new one came in and took it with me as well.
The battery came and I put it into my macbook. When turned on, the computer didn't see the battery at all and could not detect it even in the about this mac -&#62; more info. It's not worth the trouble playing the dice with this one. Waste of time.
I purchased this as a replacement for my original Macbook battery . That battery had cycled 900 times before I replaced it . This one cycled only 12 times before it warped and buckled to the point where I could not even insert it in the Macbook.I contacted the company and did not even get the courtesy of a reply . No wonder they are selling for under $20.00 now.Real junk
My 2007 white Macbook original battery is completely dead and has been for a while. I didn't want to spend $100 for an original replacement. This one was priced right and I saw several reviews, some good and some bad. With Amazon Prime, it arrived in a couple of days. I installed the battery and it had a 40% charge out of the box. I plugged in my adapter and charged it all the way.
Not a real batt just a plastic shell that lights up did a little investigation don't by anything from this seller fake Chinese knock offs that don't work . Just trying to let everyone know in dispute with company now. Email me if you think I'm lying g7 money@gmail.com. For the first time I have to admit buy real apple productsDon't even want to give star rating I was forced to they deserve negative star battery is literally a plastic white box with flashing lifhts
Battery is magical. Works perfect for my 13inch macbook that I got like 3 years ago....my battery that came with the computer just died on me and didn't want to spend $90+ on a new one at Apple. It's perfect!
Answer: It means it is a used or refurbished battery. Service Battery comes up when your battery has lost at least 1000mah. I suggest downloading a battery check (like Coconut Battery) to check how many times the battery has been charged previously. I had the same issue from multiple sellers on Amazon!