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

Input:
Question: What is the normal time of these batteries when new? And is it normal for it to trigger a "service battery" alert in the OS?
Document: I thought that maybe it would change after a few minutes, but it didn't. Still showed as plugged in with 100% full battery. After about 10 minutes, I went ahead and restarted my computer. The meter showed only 30 minutes left of battery life, and a new message appeared - "Service Battery." This is a message in the OS that lets you know the battery is not functioning properly.
I buy a lot of third party Apple batteries for my computer repair shop. These batteries were ok for the most part but not nearly as nice as a factory battery. A lot of these batteries will show up with a &#34;service battery&#34; warning even though they are brand new and working fine. I would maybe pass and pay a little more for a better battery.
Bought this as replacement after 4 years of using original battery. This battery doesn't hold a charge for very long, am lucky to get 2 hours out of it. Mac OS reports that I should service the battery soon. It's ok for the price paid though
The battery will not charge to full capacity as described. My Mac still says Service battery and holds 3 hr charge after 100% charged. It only charges to 3800mah. Seller advised to do a Calibration but that did not really help.Seller informed me that this is normal and have to just live with that capacity and will only give 3 hrs. So Every one expect only 3 hrs charge with this battery.
I just received the battery and plugged it in for the first time - displays message, "service battery". Battery has some charge (65%). Will see once a full charge has completed if the message remains.
Customer service was good. Bought one that would not charge all the way or hold a charge. Waited for another one from the vendor which worked for about 2 weeks, then randomly stopped taking a charge or discharging very quickly. not worth the hassle. the oem battery that I replaced still works better than this new one. Vendor will take the unit back and test it before giving a refund. So long story short, much more hassle than just buying an oem battery.
I have replaced 2 batteries for my Macbook. the new battery works fine. I just worry about  that the same problem will appear again.
I had this product for about a month when it started swelling up. I had recently purchased a new computer, so I took the battery out and put it aside because I wasn't going to be using my macbook for a bit. Couple weeks later, I notice the battery and it had swollen up so much that it cracked! The innards were coming out!Snapped a quick photo and rushed it to Walgreens to get it into their battery recycling program before the battery acid (do laptop batteries have acid?)
My old battery was working but swollen. The computer rocked on my desk. So I figured I would replace it with one of the cheapest batteries I could find(Apple wanted $129 for a new battery). The battery I received failed to charge at all. I reported this to Amazon and the shipper asked if I wanted a refund or a replacement. I stupidly said that I wanted a replacement. They shipped it promptly and I was able to charge it with difficulty.
Over 6 years I've been through 2 apple batteries - the original and a replacement which cost me over $80. Eventually they bulge and interfere with the mouse function and can, in worse case, explode. I would have gone without a replacement battery this time if it wasn't for the magnetic power cable which pops out way too easy. If there's no battery in the computer, obviously this kills the computer.
Answer: I'm getting about 3hrs of continuous movie play at full brightness on mine.  I didn't get a "service battery" alert although the old and tired original one did.  Make sure you "calibrate" the system for the battery.  Do a search for macbook battery calibration