There are legit VTC4's on the market. VTC5's, not so much. Those are fakes. a legit VTC4 will not have a shiny wrapper it will be dull something akin to might even have a white tag on it will not have a shiny sticker. Sony has stopped production a while back on the VTC4 not to say you wont be able to find legit v4. The Sony VTC5 on the market today are surely mislabeled or false. "The 18650 (VTC5) type batteries are no longer manufactured by Sony." quote from How do I spot a fake VTC5? Just take a look at a calendar. At the time of writing this post, December, 2014, Sony does not manufacture the VTC5. Should you buy Sony VTC5s? No, definitely not. You will likely receive a dangerous, low-quality cell, hidden under a fake shrink-tube wrapper. To confirm for yourself, email [email protected] and ask "Is my Sony VTC5s real?" What is a good alternative to the VTC5? The Samsung 25R is the best alternative to it. Edit: as of 3/8/2016 Sony has officially distanced themselves. Ie use at your own risk. I will unlock this thread for the purpose of Talks on the newer possible legit VTC4 and VTC5.