EB3A dc charging

I think this has already been asked but I just wanted to be sure. I would like to expand the capacity of my EB3A. I would like to charge it via the car charging cable connected to a lead acid battery to the DC input. Can I use the EB3A while it is charging in this configuration?
Also, can use the dc and the ac outlets at the same time?

@DrummerDave EB3A can be used while charging. AC DC outlets can also be used at the same time

I got this reply when I asked for this:

Yeah, I saw that. I’m not sure if they understood what you were asking. The answer I got to my question was yes.
My problem was that the EB3A wasn’t going to be able to power my astro rig for as long as I would need it to. I wouldneed to use the ac and the dc outlets. I also wasn’t sure if it was a good idea to be charging the EB3A while it was discharging.

In the end, I decided to use my deep cycle battery for the dc powered gear and the EB3A for my laptop with the ac charger.