iPod Video 5.5gen upgrade!
There wasn't a problem with it- I recently purchased a used iPod Video off Amazon and decided to upgrade it to the max. The battery was original, aka it was about 5-6 years old and was in need of replacing, so I got that battery. The hard drive I chose was the biggest, so I can transport my *entire* music collection and have a portable hard drive that doesn't need an external power supply in my pocket!
It went well, took about 10 minutes for everything. The only issue was putting it back together again with the hard drive bumpers and all. It feels slightly fragile, but that's allright since I don't go running with it or anything.
Get the upgrade! So worth it!!