I hope that somebody can help me. I recently purchased the 75w Snow Wolf. I am a little confused on what batteries I should be using. I was told (on this forum) to use the Efest 18650 brand. Now I'm reading that they re-wrap other batteries and to NOT use these. From what I've read, Sony and LG are good brands. Right now, I am using an Efest 3.7V 3000mAh. I don't vape with nickle or titanium coils, so I don't use the temperature control function. I vape at 36w and use an Eleaf Melo Sub-Ohm Atomizer with Eleaf Melo Coil - .5ohm. I have read so much information on batteries and to be honest, it makes my head spin. In addition to brand, I would also like to know if the 3.7V and the 3000mAh are ok. Can I go higher or lower? If anybody has an answer for me, I would be extremely grateful!