Tech Di2 battery location

[Marinejoke]

Hi, BSG recommends I have my Di2 battery positioned as low as possible on my frame. However, I want to install it in my seat post. Any real downside in this?

 

[GSAstuto]

It's probably fine wherever you can mount it and keep it protected from environment and easy enough to access for charging. As for CG effects - it's complete nonsense that a couple hundred gr frame mounted battery will in any way affect the handling. Now if it was on the handlebar, for example, it <might> change the resonant frequency associated with possible fork shake (even some computer mounts will induce or reduce this).

 

[Marinejoke]

That's what I thought...thanks!