OK, I'm as staunch a V2 guy as anyone here, and I'm a bit disappointed with the battery quality post and other problems discussed. I figure I'm going to keep my eyes open for alternatives if problems start to affect me on a consistent basis OR I can confirm and justify my faith in V2.
But at any rate, I've been doing some business in juice with a company that also offers a variety of batteries and accessories, including RF808D types. I noticed they had a USB powered pass-through at the stunning price of $10.95 . Mind you, their lowest freight is $2 for USPS, so in all it's pretty cheap.
So on a whim I ordered one with my last juice purchase, if anything to see how the quality stacks up. I got the thing on Wednesday. The first thing I noticed was that it would NOT work on a standard V2 wall charger. This kinda made sense because V2 says you need a charger with about 20% MORE milliAmps to push one of these things (and they offer a kit for this).
I tried it on the V2 12v car charger .... works fine. On a computer USB port (5v nominal) .... just as good. Now here's where it gets interesting. Some may recall a post I made about using a powered USB hub to charge batteries with the USB adapter cord. Well, OK ... I got my hub out but couldn't find the 5v power adapter .... BUT I did have a universal, variable power transformer that can fit a variety of devices. Sure enough I found a proper plug and then dialed in the power to 5 volts.
Let me digress - I'm a computer guy and have been building them for 16 years. I'm also into "overclocking" - a sort-of "hot-rodding" processors to go faster than what Intel-Inside or AMD intended.
That stated, looking at the power selection slider bar on the transformer, I quickly eyed the settings for 5.5 volts ... (hmmmm) ....... 6.0 volts (oh yeah !!!) ..... up to ( uh-oh, somebody hold me back !!!!) 7.5 volts !!!! And all in handy-dandy .5 volt increments for your pushing-the-limits pleasure.
I mean, what the hell, we got only 11 bucks invested here, lessee what this baby can do !
5.5 volts - Oh yeah, bunches more vapor. A little warmth on the carto
6.0 volts - Even MORE vapor !!! Ooooops ! Oh crap, this tastes like poop. Fried the atomizer
Conclusion - even the 5 volts may be pushing the limit. 5.5 volts is do-able. 6.0 volts - not good for carto life or your taste buds.
The Jondster recommends a 10% "overclock" at maximum