Maybe I can shed some light here, or give a different perspective. I have ordered 30+ Ego-c Twist batteries, 650, 950, & 1000mAh’s in 6 mts., from Myvaporstore.com, because so many broke & I was new to this. They are listed as OEM from Joyetech. Currently, I have 5 good ones left. Only 1 arrived d.o.a., promptly replaced by MVS. The remaining batteries went bad/were retired because of 1 of 3 issues:
About 5 due to faulty buttons (straight up poor QC)
About 5 due to the possibility of juice that leaked into the batteries(?) (Clearomizers & my fault(?))
About 5 due to dropping once or twice, causing the top tip portion of the battery to SEPARATE from the battery, causing exposed and disconnected wired (poor QC- tip should be secured better as to not become separated from 2 drops, no doubt)
And 15+ due to something that I will classify as, in my opinion, 50% my fault & 50% poor QC.
These last 10, I consider to be rare & unusual circumstances because of the manner in which my 50% fault came to be.
To save everyone the actual unusual circumstances, I’ll simply say that, while at work, I would keep my ‘pipe’, as I’ve nicknamed them, in sort of a holder on my belt. I never learned; about once a week, I’d accidentally bang the pipe into a door frame or something similar, while it was on my belt. Each time, like clockwork, this caused the Clearomizer to become separated from the battery. This also caused some wires to disconnect from the small motherboard. Upon looking further into the damaged batteries, I noticed how brittle the wires AND connections seemed, my opinion, poor QC.
3 QC issues: poor connection for battery tip,
weak, brittle wiring,
poor wire connections,
bad button support,
unsealed battery tip (leaks from above)
I don’t know why, but I am still faithful to the Ego-c Twist.
I have learned how to better take care of/maintain them more as time went on. I am currently trying to solder the broken wires, with success on my first battery. One member posted that there is a 2 yr manufacturer’s warranty on these. HOWEVER, MVS offers only a 14 day warranty, can someone help me understand?