I really recommend the vamo v5. Had the v3 for a year and and I abused the hell out it so I just got a v5 a month ago. So solid and reliable. It goes up to 15w, I believe the Tesla goes to about 12w.
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The Tesla goes up to 15watts
Vamo's are well known for bad 510 threads, only have to do a search on ECF for the problem and will get dozens of threads complaining about it. But everyone has there favorites, just like a lot of people rant how good the MVP2 is, where I have moved away from them, because to many connection problems with toppers.