How long should a Vamo V3 last with daily use? I've had mine for 2 weeks and no problems... I assumed it would last years if taken care of.
Correct. If you've got a good one you should get a lot of use out of it.
The weak link is generally the 510 connector. The threads are a little soft and it's possible to push the center pin in.
I've heard of people stripping the 510 threads (leave a clearo on it, put in your back pocket, then sit on it) and if you tighten devices with a fixed center pin all the way down then you can push the center pin in so it no longer makes contact on other devices. It's possible to get the center pin back out.
There are a few manufacturing issues that pop up from time to time depending on which factory it came out of. You'll normally see it from retailers who buy the absolute cheapest Vamos they can get, and don't do any quality checks. Anyone buying the cheapest from China needs to be doing their own quality control, because that's the import bit that is missing and why it's so cheap. People don't understand this and unfortunately it's not obvious to us because they often retail the things for the same price everyone else is charging. The buyer gets the thing home and finds that half their 510 devices won't even screw on. There can also be an issue with the soldering of the wire on the center pin. The cheap cheapies are usually V2's
Same as with any APV, Keep the battery contacts clean, and keep juice/water/dirt and other gunk out of the PV otherwise you are going to be having to do more maintenance. The old V2 screen can be full submerged (didn't hurt mine anyway) however I've heard the oLed display (V3 onwards) is not sealed, which might make cleaning a bit more complicated.