I too was also thinking of trying the 601 or e-cigar.
Yes the battery life on the 510 is, I think, the only draw back to that model. I use my passthrough when I'm at my desk, I have one of those USB things that plug into the cig lighter of a car and use another passthrough when driving. Then I have a PCC for when I'm not around any power source... so you can spend more $ on
devices to keep your 510 going than you actually spend on the kit itself! :s BUT, it's sure is heaving
vaping your favoriate
juice in it!