This is a guest post written by Morandir835, an e-cig enthusiast, admin on the Vapor4Life forum, and a regular on their ECF sub forum. V4L  recently brought back the OMG line of mods, the first of the two being the OMG All Day (OMG AD). Before I even touch up on any of the key aspects of this device, it's time for a mod refresher course. A mod is short for a modified e-cig. What it means is that it no longer is the usual analog looking device, and usually is much more versatile than a normal ecig when it comes to batteries and carto/ atty combinations. These usually need a little more battery knowledge and can be unregulated, fixed voltage, or variable. Voltage The OMG AD is a mechanical unregulated mod. This means it's voltage is controlled only by the battery, and there is no integrated controller of any sort on the pv itself. This is why the OMG AD is shipped with a protected lithium-ion batt, while it does not have the higher amperage output of a high drain (imr) or voltage holding capabilities, the protection circuit on the batt makes the mod as safe as possible. Battery Life The biggest asset of this mod is battery life. Where an XL Vapor King Diamond manual battery is around 410mah, and the V4L EGO is 900mah, the battery shipped with the OMG AD are 1500Mah, which translates to 2/3 more run time than what you get with an EGO. Because of the nature of the cells in them, they do not hold their voltage the same way as a Vapor King Diamond, but if battery life is your top concern than that really won't be a minus to you. The button requires a little more pressure than some are used to activate it but is on par with any other mechanical mod.  Another thing to note, the connection only has two holes, so the draw is very similar to that of the EGO, though slightly airier. These take 18490/18500 batts to power and the charger that ships with it is a multi-charger. Only use protected lithium-ion batts with it and the OMG AD though. Do you still have questions about Vapor4Life's OMG All Day batteries? Just let me know, I'd be happy to help! Contact Morandir835 via e-mail at  [email protected]  or through his page on ECF at  http://www.e-cigarette-forum.com/forum/members/51087/morandir835.html "Even Though I Nothing Learned, With Strength I Burned."  €“ Emperor