I use an E-Power which is a 3.7V device and I use the Ressurector cartos in a 3.5ml carto tank.
The Ressurectors are awesome and give a great vape. They are designed for 3.7V PVs, but they will work on an eGo. They dont run at full potential on an eGo, since the eGo is only 3.3-3.4V, but they still work well, and a lot of people that use an eGo love the Ressurectors. They dont leak and last a long time.
The Ressurectors hold a little over 2ml of juice so they last a long time without needing a refill. I used the Ressurectors by themselves for quite awhile when I started vaping and they still lasted quite a while, even not in a tank. Now I use the in a Smoktech 3.5ml tank so they last even longer. They work great in a tank and produce a ton of vapor with really good flavor.
I like the Smoktech 3.5ml tank bc its cheap and works really well. Smoktech does make a bigger 6ml tank, but personally I think they look weird on an eGo/E-Power/kGo sized PV, and make the PV really top-heavy. The 3.5ml tank is perfect for eGo/E-power sized PVs and is about the same diameter as the battery tube so it looks nice and doesnt make the PV top heavy.
Heres a picture of my E-Power:
The first picture is a Ressurector by itself, and the second picture is of a Ressurector in the 3.5ml tank.
I like the 3.5ml tank bc I can fill it in the morning and not need a refill all day, yet its still small enough that I can easily carry my E-Power with the tank on it in my pocket. I also really like the SMoktech tanks bc you can get cartos for it that have a metal base on them. You dont necessarily have to use a carto with the metal base, but they are nice bc it stops the tank from being able to slide down. The Smoktech tanks are a dual coil tank, but that doesnt mean you have to use a dual coil carto. The tank comes with a pre-punched dual coil carto in it, but personally I think dual coils suck at lower voltages so I took it out and didnt use it. The Ressurector cartos are the same size as a dual coil carto, so they fit perfectly in the tank, and I think they work a LOT better than any dual coil does. Plus since the Ressurectors are single coil, they dont drain your battery like a dual coil does.
Crystal Clear Vaping (CCV) sells the Ressurector cartos for a great price and they have free shipping. I would def try them bc I think youll really like them a lot, and if you buy a 15-pack you get a free drip tip. I would def try them.
And if you do decide you really like them and want to go even longer without needing to refill, CCV also sells the Smoktech tanks. You can get a 3.5ml tank for only $10.50 and it comes with a pre-punched carto in it and a drip tip which makes it an even better deal. CCV also sells pre-punched Ressurectors for the Smoktech tanks and they have the metal base on them like the carto that comes with the tank.
I would def try the Ressurectors bc I think youll really like them. Even just a 5-pack would be a good way to try them since the shipping is free and then you could always buy a 15-pack and/or a tank later.
It does depend on what juices your using, but when I didnt use them in a tank I would get on avg 1-3 weeks with one Ressurector. Now using them in a tank they last even longer and I get about 2-4 weeks from one.
They work awesome and for the price and how long they can last, their def a great deal.
If you do order from CCV, dont forget to put in "ecf5off" bc youll get 5% off the order