72Wh 61++ 01AV427 01AV425 Battery for Lenovo ThinkPad T480 T470 P51S P52S T570 T580 A485 A475 TP25 Series SB10K97584 SB10K97585 01AV490 01AV492 X50M08812 4X50M08812 01AV422 01AV423 01AV428

I used this to replace the original external battery (battery 2) on my Lenovo Thinkpad T480. The original interal battery was replaced about 6 months ago, and the external one still said the health was good at the time. However, it recently began a rapid decline and then would no longer hold a charge, at times preventing the laptop from charging the internal battery as a result. This arrived just over 70% charged, which is what they should be, and was immediately recognized and began charging after inserted. So far, so good, the performance is wha should be expected from an extended battery, and coupled with the internal battery I now have approximately 100Wh of battery to work with, more than enough to last all day without access to a charger. For the price, I consider it a great deal.

Frustrating experience — battery sold as 72 Wh, but the reported design capacity is only 64 Wh. On top of that, the battery only charges up to 57.72 Wh. I returned it and received a replacement, but the second battery had the same issue.

So far it's lasted me almost a year, pretty good for a 3rd party battery.Also, I like the thicker design of it over the stock battery since it elevates the back of the case a little and lets more airflow underneath.

The battery capacity is great on this external battery. It functions well and has held up nicely over the months I have owned. Continues to keep the charge and provide hours of computer usage. It is durable as I have had a few mishaps, but continued to work as designed.

If you want a battery for older Thinkpads this thing works the problem is with the capacity! The designed watt hour and the full charged watt hour is different , means a lot of things but likely this battery is aged or it’s a recycled one so it’s a used one technically speaking , one unit I got says 71 watt hour by design but I got a 56.72 watt hour when full! So this battery is technically speaking a dying one!To make things short save your money and buy original if you can get one , other wise use Anker power banks externally if you want mobility like I do!At least you get a use of the power banks energy wise than buying a dead reused batteries!!Don’t get ripped off!

It fits the laptop (T580) pretty well, no problems there, but the capacity is not as described. It is around 57Wh not the claimed 72 Wh. At first I thought I got a bad/old/b-grade battery but there is another Amazon reviewer who got 2 of these with the same with the same issue withe the same diminished capacity. You might want to buy another brand.

I bought this quickly and did not realize I bought the biggest battery with a larger physical footprint. With a new internal battery (separate purchase) and this new external battery the laptop lasts all day long... pretty awesome... but the larger battery size is worth considering. I have to remove the battery to fit in my laptop bag. That said, it's external and the laptop can function without it so it is a very effective external battery backup.

Was able to install battery although it was a bit tight since the casing is new. Fully charged and shows full capacity as listed. Let’s see how it fares after a month.