Considering the damage a 3rd party battery can potentially cause, I can see where Lenovo is coming from.<p>Of course there&#x27;s also the aspect of securing margins on accessories, but there&#x27;s also the aspect of making sure people&#x27;s machines don&#x27;t go up in flames or fail in ways that might trigger expensive repairs (which Lenovo will have to pay for if the device is still in warranty)