Genuine Single Efest IMR 18350 LiMn 700 mAh Battery Flat Top. These batteries have a lower internal resistance and therefore will deliver more current under a heavy load than most lithium 18350s when used in a high-drain e-cig, or vaporizer.
Safe chemistry LiMN means reduced risk of venting with flame or explosion. Due to the safety inherent in IMR safe chemistry batteries there is no protection circuitry added or built in. This provides a slightly shorter battery length to enable a good fit in most mods.
To ensure longevity, it is not recommended to allow the battery to discharge below 2.5V.