Battery fails to respond

The device itself is neat, but the battery is hard to use.
Already at delivery has the battery, despite full charge and display 100%, completely discharged after 10 minutes and the unit has shut down because they could not fast enough whip out the power cord. This was not known to me from other laptops here.

Now, after only 4 weeks use, the device can only start with power cord, and then only after letting previously connected about 5 minutes. Otherwise, the start attempt is countered with immediate demolition and shutdown.
Despite ad 100% charged, the device is recommended with warning: "battery swap".
Conclusion: the battery needs to be replaced well.

Update: I now get a replacement battery, but the postage for the return had to take over himself. Since the battery is not particularly hard to keep costs in check.
The device, however, still turns at the start with the Note from "Fan error". Times have searched and found that the fan has to be cleaned on the Internet. There are instructions on the net, in case one should have the same problem. Seems at the Think Pads very common to be.

Since I still have expenses with the device and it does not work still properly, my review improved by only 2 stars so far on now 3 star.
From absolute satisfaction with the product you purchased, I am still far away.