TF1 battery with main feature,ego-t metal part & variable voltage metal part for your choose, battery removable, works with CE4 Clearomizer/THOR CE4, evod, MT3 or any other ego thread atomizers. It¡¯s designed to avoid battery defection & battery insecurity. Battery used is 14500 battery, which can be took out to be charged. Besides, battery inside is durable. So it¡¯s quite safe to be used. Advantages of TF1 battery 1. Metal part replaceable-Conventional metal part & variable voltage metal part for your choose. 2. Safety- the 14500 battery inside can be took out for being charged. It has battery-reverse protection, short-circuit protection, over-charge, over-discharge protection. 3. Cost-effectiveness- since battery can be took out, you only need to replace the body or the battery when it broke. 4. Wide application range- the eGo-RS battery is with ego thread. So it can work with most of the atomizers in the market. Such as ce4 clearomizer, THOR CE4 clearomizers, evod clearomzier and MT3 clearomizer etc. Specification: Diameter 15mm length 8.84cm battery size 900mah weight 40g color black, white, pink, titanium, stainless,red, blue, green and purple color battery model 14500 battery, can be replaced Gift box size 175*73*54mm