PCC = Personal Charging Case. It houses a battery and can charge your battery on the go while holding an atty w/cart and 2 additional carts.
I'm not endorsing anyone but here's a link, I happened to be looking at Ruyan's site. I got my PCC with my Totally Wicked Titan starter kit.
510 PCC
I only have one manual 510 battery and a pass
through but I have noticed that my battery isn't quite like it was the first week. I have nothing to back this up but I suspect that if I had a regular wall charger that my battery would get a really good charge and work better. I don't think the PCC is meant to be the main charger, more of a convenience while on the go. I was going to order more
batteries but I decided to put that money into a Prodigy V1 instead.