GHUNew Battery 58 WH Compatible with Thinkpad G580 Y580 G480 G485 G585 Y480 Y480N Y485 Y485N Y480P Y580 Y580N Y485P Z380 Z480 Y580P Z580 Z585 Z485 G700 G710 P580 P585

So far so good. The battery fits perfectly and matches the original battery pack size and shape. I had it go through several power-up/power-down cycles of the battery and it is giving me about 2 to 2.5 hrs. of usage time when I have the battery selection set to the second position from the left inside the battery settings under Windows 10. Good value to keep my X220 Tablet (Intel 7 with 6GB of memory) working for few more yrs.

Manufacturing date was a a couple of years prior, so 95% is pretty darn good.

My laptop was slow as a slug. Now she's a lot better. Of course time will tell on longevity

Having bought an identical (X230T) GHU battery that shows SUPERB performance after 3 years of ownership, I am really uncomfortable writing this review.I will see how this will get resolved -- I seriously hope that I will be able to change the rating, but for now, take it as a warning.ThinkPads allow detailed battery reporting via TLP utility. You buy a battery, re-calibrate it from 0-100% and after 2-3 times, it should report 100% capacity and keep it like this for months or even years.Trusting GHU brand, I bought 2 of these batteries. Of the 2, one battery was mislabeled and a completely different model was in the box. The 2nd battery (brand new) went down from 90% capacity to 80% capacity after just 9 (nine!) charging cycles. I reported to seller and they offered to replace (under warranty). BUT, in the meantime, I received the replacement for the wrong battery, and while it originally reported 100% capacity, it's down to 90% after the first calibration charge... whoa.I will keep trying to calibrate it back to 100% capacity. I even tried a different laptop, but that 2nd machine reported the exact same problems with the battery -- too bad :(FYI, these new batteries self-report as "LGC"-made cells and they were manufactured in September 2020. Charge cycles are below 10, so basically brand new. Manufacturer promises that they will last 500 cycles (typically that's interpreted as drop to 80% capacity after 500 cycles, not just 10).So, after getting one wrong battery and a faulty one, I will try and see if the 3rd one (warranty replacement) will be better. Then I hope, I will be able to give it 5 stars. Otherwise, no more GHU for me. This is not the seller's fault, it's the factory selling faulty cells, hoping that nobody will notice.

Update 5 September 20237 hours now. Battery was new, with only one cycle charge. Very good results, super solid.------------I was getting ~2 hours with an old battery. This one is giving me ~6 hours after the first charge. Much better but not as good as my original battery when new.I will perform a battery calibration and report back.X220, SSD, 60% brightness , wifi on, bluetooth off, Linux Mint.

I charged the battery for twelve hours. Next day I let it discharge all the way. The day after i had six hours of power during moderate use like sending and reading a lot of messages, browsing the Internet, playing some videos, etc. The laptop is heavier now, but it's worth it.

dose the trick

After 4 cycles of full discharge, the full energy capacity is 97 Wh at a design capacity of 86 Wh. So far this appears to be better than expected. Let's hope it would stay this way for long enough.