I see too much nonsense and questions regarding Efests to completely trust them. I know my threshold for safety might be different than others... so of course YMMV.
Just saw this this morning:
http://www.e-cigarette-forum.com/fo...587759-purle-efest-18650-battery-warning.html
It seems there's often red flags popping up regarding Efests.. hence my reluctance to trust their specs. At least until they've been tried and proven reliable by others more risky and trusting than myself.
Also... those specs aren't a whole lot different than VTC5s and to me, I feel a hell of a lot safer using the sonys over anything efests given similar specs, just based on track record.