Why is Lenovo battery for T440S lasts only one year? After the warranty ended, the battery that as new lasted more than 8 hour

[Petertal]

I have a one year and one month ThinkPad T440S. When it was new, the batteries lasted more than 8 hours. A year after - the computer cannot run more than 1/5 hour on the same batteries. Why?

 

[Laptop_Nerd]

This could be due to the normal ware and tare of the laptop battery. As far as I know they should last around a year or two but it all depends on how the device is being used. Here's some tips from Lenovo themself on how to extend the battery life of your laptop.

https://support.lenovo.com/us/en/documents/migr-50944

 

[BigBadBeef]

I have a one year and one month ThinkPad T440S. When it was new, the batteries lasted more than 8 hours. A year after - the computer cannot run more than 1/5 hour on the same batteries. Why?

https://www.youtube.com/watch?v=eTdseBKbWAE

Nothing produced can be allowed to maintain a lifespan longer than what can be endured in order to continue cyclical consumption.