Exhalevapors is running a deal on Ego TWIST batteries. These are Genuine Joyetech Ego Twists. Does this matter? I never had any issues with my Joye twists but have had many "ego style" twist batteries break on me. Its my opinion that Joyetech has higher quality control standards. You can get knockoff twists cheaper but if you want a Joyetech your going to spend $25-29.00 for the 1000mah - so this a good price.