I just laughed so hard at this. I hate the E2's. I tried 15 of them and then gave up.
Burn me once shame on me, burn me twice shame on you. I tried up to V3 and V3 was the worst. I have signed off on them period. Now RS has come out with their own version of the MapTank.
The closest I have come to wrt a tank system has been the eGo T. That being said even that has its draw backs although it is too early to tell. I have tried and made bottom feeders, nope not for me.
I do believe though by the end of 2011 we will see something... because lets face it, there is just to many imaginative folks out there. The better mouse trap is on the horizon. I believe it will be a combination of many innovations combined into one package.
2010 has seen the Darwin (wattage controlled) soon we will see the Eclipse with its integrated juice feeder system. These are all great devices. The Achilles heel they are electronic devices. The Darwin and Provari has had some serious hickups and this has been in only a short period, the Eclipse has yet to be released.
Being a former Control Tech, the more complex a control system (although it has many attributes) the more complex and labour intensive it is to maintain. It also goes without saying the more components a system has, the more can go wrong. I am not bashing electronics, mechanical components will wear as well. Electronics on the other hand can fail for a variety of reasons, and hence why it is the Achilles heel in a PV.
If we take the simple eGo batt, where it is the mofset that fails in most cases rendering the batt totally useless.