|Well I don't know. You've got the thing sitting in front of you. I suppose you can go into bios setup and check for options relating to the battery.|
I think this is the manual. You might check it to see if it says anything about the battery:
There might be more document downloads on the lenovo support page for that model.
That looks like a fairly new laptop. If it's still under warranty just take it into a shop and have them look at it.