I chain vape and I went to a party with 2 normal pccs in my pocket which was bulky and sucked. The Kanger XLPCC seems real cool but it's big and only charges 4 times--my 2 pccs do 3 each. Is there any PCC that is better? Or a small power pack that I could attach to 1 of my pccs and sit in my pocket. IMO the PCCs suck -- either cheap and crappy or bulky for just 1 extra charge... Any suggestions?