EGo-T 900mAh battery is a basic eGo vape pen. The battery is easy to use with a 5 click on and off feature to avoid accidental firing. The eGo-T is great to replace an old vaoe pen or perfect to have an additional battery to use. The eGo battery is 900mAh, which can last a few days of vaping with over 800 puffs. This battery is the perfect battery for those who want something simple and basic. It is easy to use and small to carry around.