I recently procured a pi-top  (version 2) via eBay. It came assembled and with a Pi and inventor’s kit already installed.
Everything works as expected except the pi-top will not run on battery power. As soon as I unplug the unit, it shuts off. The battery does show up in the OS panel as being fully charged and connected to external power.
When I run the pt-battery command:
> pi@pi-top:~ $ pt-battery > Charging State: 2 > Capacity: 100 > Time Remaining: 0 > Wattage: 0
There is a green light on the Hub PCB, and a green light on the back panel of the case near the connectors. The security seals on the ribbon cables appear to be in tact.
Ideas? Do I need to replace the battery? Is it possible?
(Note: I also contacted support, but haven’t heard back yet. Thought I’d check with the forum community too)