Hi there everyone, after many weeks of careful testing I'm happy to be able to provide genuine OEM Arizer Air cells to the community. I am procuring these cells directly from the manufacturer of the Air's "stock" cells as they are under no exclusivity agreement. Therefore, these cells are for all intents and purposes stock batteries, although I can make no guarantees about the validity of your warranty after using them. These cells are among the first on the market to use an innovative new IMR chemistry which allows them to have a higher capacity and more consistent discharge curve while staying safe and keeping a high discharge current. BAK advertises a 2150mAh capacity for these cells - and in testing they meter out to near exactly that. I need to stress just how incredibly rare it is for a manufacturer to even get close to hitting their advertised capacities - even reputable companies generally advertise number in 10 - 20% excess of their real world capabilities. BAK is one of the first companies I've seen who are willing to cut the bullshit, and I really appreciate that. For various reasons I cannot recommend the use of any other kind of battery in the Arizer Air. The battery environment is borderline abusive - very high drain current, high temperatures, extra-low cutoff voltage... it's just not a safe environment for most kinds of cells. These cells are specially designed to take the extreme conditions it is subjected to under operation - in fact these cells are pretty much impossible to damage electrically. The list of safety tests they have to past in batch QC is staggering: On the bright side though, any charger that is designed to work with Li-Ion batteries is going to be compatible with these cells, although most will only charge them to around 90% capacity. Please keep in mind that these batteries are not protected and should not be used in any unprotected devices! You can place your order at VapePower.ca. If I have missed anything, feel free to ask any questions you may have below!