I have not seen this question updated since 2017. I just purchased a PowerCore+ 26800. Does the PC 26800 support pass-through charging? The diagram in the manual seems to suggest it. I travel a good bit, and sometimes power outlets are in short supply in older hotels. So, if I could plug my MacBook Pro into the wall and then plug the PowerCore into the MBP and then plug devices into the PowerCore, that would be great. I’d try it out, but don’t want to create a power back-feed on my computer without something saying it works first.
No, PowerCore+ 26800 PD does not support passthrough charging.