KangerTech produces this classic pen-style battery.

• Chargers with the screw on the (basic) top charger.
• Roughly 6 1/2 hours of use on one charge.
• Evod Style flush button / redesigned ego style 510 connection for increased ease of use.
• On / Off safety feature
• 5 quick clicks turn on or off this unit,
• 1 - 2 hours of charging time.

Includes 

• 1 650 Basic Battery
• 1 Top Charger ( USB connection)