650mah battery is a basic generic vaporizer pen. It is great to use to replace your old pen or just to have an additional battery to vape. It is a simple vaporizer pen to get you vaping in no time without any technical issues. Turn on the battery by pressing the button 5 times and start vaping. The eGo-T battery is 650mah so it will last more than 500 puffs. This Generic battery is perfect if you are interested in something simple and clean. Small and compact makes it easy to carry around, and easily charge the battery without having to worry about taking anything apart.