New Apple iPod Video Classic 5th 5.5 Enhanced Atomic Ocean Blue / Grey / Grey (Ocean Blue) Capacity & Battery:1TB (2000mah) 120GB iPods are a mix

120GB iPods are a mix of 6th & 7th Generation logic boards

and on board volume adjustment control

(Apple EarPods

iFlash uDUAL & Generic Dual MicroSD

I was able to get the uDUAL to fit/close with a thin backplate and the following batteries:

New Apple iPod Video Classic 5th 5.5 Enhanced Atomic Ocean Blue / Grey / Grey (Ocean Blue) Capacity & Battery:1TB (2000mah) 120GB iPods are a mix128GB (32MB) 256GB (64MB) 512GB (64MB) 1TB (64MB) 2TB (64MB) iPods are upgraded with SD card storage using Tarkans iFlash Solo, Dual & Quad adapters. All iPods come with a new USB charge sync cable! Limited Warranty Information & FAQ Access Here