801 on a 901, would i need an adapter?

[plastictree]

Looking into the v4l dial a volt, auto switch twist like battery. I want to get it and put an 801 fusion carto tank on it but v4l batteries are 901. I'm wondering if it would work?

 

[tmcase]

You would need an adapter like this one 901 Battery to 801 Atomizer Long Adapter