stopped working after 45 days. stopped working after 45 days. After reading other reviews, I will not be asking for an replacement, I've already thrown it in the trash. Just a waist of your hard earned dollars.

Tried to re-order a product which is impossible to do Tried to re-order a product. Opened their website 3 times. There is no search function on the O2VAPE website. Called customer service to order and the person who answered said she was new and not at her desk, put me on hold for along time. I finally asked to speak to a manager. The rep cut off the call. A manager called back. He was was extremely rude, blaming my computer and me. I don't know how this company stays in business. I noticed that 25% of their customer reviews are "1 star". I will now buy my products somewhere else!!!

Great battery Great battery! Love that it is adjustable. Charges quickly and stay charged for a long time. No issues with the battery thus far. Would highly recommend:}

Their shipping costs are outrageous! Their products are okay. The vape batteries don't seem to last as long as other brands and the charger is terrible on the pen batteries. It stops charging after a while and I've had this happen on 3 batteries from O2Vape so it wasn't just one battery. My real problem with O2Vape is their outrageous shipping costs. You will double your total costs when you check out just due to their hidden costs in their outrageous shipping. Your shipping costs ARE HIDDEN. The buyer can't see the way overpriced shipping/handling fee until after they have given their credit card at the very end of the transaction. If I buy a vape pen for say, $40 there, the shipping and handling would be almost that much so yes, the price doubles with your outrageous shipping costs. What a way to rip people off.

Trustworthy source for high quality vape hardware. Very pleased with the quality of product this company produces. You can just tell the product people are quite deliberate about the engineering and aesthetic choices that go into the production and sale of their hardware. There are so many companies producing this kind of hardware that DO NOT care about the quality or safety of their products - I purchased from several of them before I found O2 - and there is a world of difference here. Some examples of why I think they make GOOD STUFF: - Tasty carts. Everything I vape through their cartridges (both full-ceramic and non) tastes like... the thing I'm vaping through it, and nothing else! No metallic taste, no "dry hit" taste. Of course this depends on the thing vaped through it, and O2 can't control that, but what they can control for, they do. - Reusable carts. You get what you pay for. I have refilled my O2 carts several times before they start to get "stale." I have experience re-using carts from other brands like Delta Ape, and CBD is Better. No knock on those folks, they make fine disposables, IMO. But this product is superior for the environment relative to those, and in the long run, is actually cheaper per use, because you get more uses out of it. Of course this also depends on your usage habits and what you vape through them, so YMMV. - Well constructed carts. You can just tell by looking at and touching the carts that they are well-constructed. The silicon seals are of good quality. The glass is ground so as not to have any sharp edges. The carb on the airflow-adjustable carts actually works well. All of these things indicate attention to detail, and good design to me. - Stylish, discreet, and reliable, variable voltage batteries (I got two Nano's and two Lil' Bitty's). The "user interface" on these is as simple as it needs to be, and no simpler. They're efficient, no-nonsense devices compatible with a wide range of carts. AND, they're serviceable (of course you need to know what you're doing regarding circuits and batteries).