Kanger Tech produces this classic pen-style battery

• Chargers with the USB Connection Pass-through Charger from the bottom of the unit.
• 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 Pass-Through Battery
• 1 Pass-Through charging cable ( USB connection)