Sadly Fogstar is showing out of stock of the Xtar PB2, but Ali Express have them in stock in all colours.
Yep I love mine great bit if kit for when I need an extra charger at home, or going away for a bit.
It actually charged slightly faster than my VC4
PB2 can use as a power bank too. XTAR may release PB2 upgrades this year.
I know makes it handy for charging phone if get caught in emergency.
I wonder what the upgrades are, if I could make a suggestion, add a ribbon to help get batteries out or make the battery connectors slideable so mayeven fit protected 18650's.