A1322 New Laptop Battery for MacBook Pro 13" A1322 A1278 (Mid 2009,Mid 2010,Early 2011,Late 2011,Mid 2012);661-5229 020-6547-A 661-5557 MB990LL/A MB991LL/A MC374LL/A MC700LL/A --12 Months Warranty

It looks and feels like OEM. They give you a manual but it's just warnings. There are no step by step instructions but you don't need them. It's simple. You unscrew the back unscrew 2 screws holding down the battery and unplug it and lifted out. Then stick in the replacement and button it all back up again. I made an instructional video but I couldn't load it to Amazon but it's on YouTube for your viewing pleasure. It came with 4 screwdrivers 2 phillips head and 2 torx heads. Even though they are cheap it's nice to have them included. The battery came charged at 76% so it charged up to 100% in no time. Charging from low like 5% takes about the same time as OEM. Discharging the battery however is different. Works normally to under 50% then from anywhere in the 40% to 30% it will drop suddenly to below 7% instantly. I haven't seen any readings in the 20s or teens. Seems to have a problem giving proper readings below 50%. No warping does not get as hot and seems to work but the capacity may be lower than indicated. IDK. Update: Great customer service. They heard about my issue and sent me a replacement.

The battery seems good so far. The one I received came with a 0 cycles and a 77% charge, as well as being slightly larger than the original battery by 217mAh. After reading online for an hour at 25% brightness, the battery went down to 86% from a full charge and it's estimated to last another ~7 hours of the same activity. This is with a ssd, more memory, and replaced thermal paste so it runs relatively cool. It seems the runtime will be proportionate to the additional mAh over my worn old battery. Overall if it continues to work this well, it's a great value. Although I will update if the condition changes.

Installed September 2019, died July 2020. Got drained and refused to hold a charge. I would say the value for the money is pretty poor as I paid $38 for a with a terminal condition (get it?). I ended up reinstalling the old battery that came with my 2012 MacBook Pro and it's working like a champ. Wenyaa gonna see my money again? Nevaa! It was easy to install provided you have fingers on your hands.

I have purchased four replacement batteries over the years for a 2009 MacBook Pro. This is the first one that provides long running time after a couple of months of use and does not rapidly fail. The battery takes longer to charge than others I have purchased but it lasts several hours. It will even hold about 80% of a charge for over a week in an unused computer. That's better than most replacements I tried.

I had been putting off changing my MacBook battery. It finally became so swollen, the touchpad was pushed upwards. After fighting to get the old battery out, this battery was a breeze to install. My MacBook is doing great now. *UPDATE* 4-11-20 Battery does not hold a charge for longer than 20 minutes now. It was working fine at first but now it dies quickly.

This seemed like a good deal, but the first battery I was sent bulged inside my computer whenever charged such that it affected the track pad (wouldn't click, inconsistent responsiveness). When I asked about it, I was told to send it back for a replacement, which was delivered fairly promptly. The new one seemed to work just fine with a noticeably longer battery life once calibrated. I'd say this is a decent enough battery for the money, even if you might need to spend a bit of extra time making sure you receive a properly working one. They were easy enough to deal with if you do have any initial issues.

Update 5/17/19: I had a minor issue with the battery which caused my track pad to bulge a little so I contacted the company and they promptly sent a replacement. I'm now back on track with a very good battery and very satisfied. So far the battery is holding up great. When I got it I went through the charge and discharge procedure, it it's now holding a charge and lasting a long time. The price was great, it came with four free tools to help with the install, and arrive extremely fast. I highly recommended this battery.

The battery was great at first. Worked well in my 13" 2012 Macbook pro. Over the last few months, it couldn't hold a charge well at all. I could fully charge it, put the computer in sleep mode overnight, and the battery would be less than 25% charge by the morning. My mac keeps giving me warnings to "Service Battery". Bought the battery in April 2019. Significantly worse performance by Nov 2019. Finally getting around to replacing it in Jan 2020.