This is my second device from this seller.  The other one turned out to be perfect and had BOTH internal & external batteries, AS IT SHOULD.  You need to check for BOTH batteries right away.  They are standard and the sellers should NOT be trying to rip people off by failing to make sure both are installed and operating at the renewed standard of 80% minimum.  THIS device, unfortunately, produced a battery health report (via CMD) showed "no battery" for external and some specs for the internal, which is absolutely WRONG.  I had plugged it in to allow a full charge while I did initial setup.  After the battery health report, unplugged and removed external battery, reinserted & plugged in, NO RESPONSE.  Laptop would NOT turn on.  Did the emergency reset hole on bottom - NO RESPONSE.  Tried a good battery from another ThinkPad - NO RESPONSE.  So something is VERY FU with this device and it's going back.  Already had this problem with a different seller, but was looking forward to a good device with THIS seller b/c already got one good renewed ThinkPad from THIS seller.  Now VERY disappointed.