This is the Evod 900 mAh Battery.
The Evod battery has a 510 thread providing versatility in relation to cartomisers that fit it.
Battery safety built in!
Your battery will not start when in off position, if you try to push the button.
To turn the battery on, press the button 5 times within 2 seconds.
You will see the white LED flash.
To turn the battery off, press the button 5 times within 2 second and again the white LED will flash.
This provides you with protection that it will not start when placed in your pocket or bag.