...I got a MP4 player that looks like a Ipod Nano and the battery life on it is around 1 hour even after conditioning the battery (rubbish) when I listen to radio on it.

Can I possibly buy a ipod nano battery and put this in the fake ipod nano? If not can you recommend a battery replacement.

Thanks

it may look like a nano but there will be no guarantees the battery will fit in your mp4 player, I would suggest just either finding a replacement battery for the make and model of the mp4 player or just going out and getting a better mp4 player

Anywhere you suggest for a replacement battery?

without known make an model nope

You'd be better off just opening it up, taking out the current battery, and then using that as your guide to getting a replacement.

If it's just some generic MP4 player nano fake .... god knows what sort of battery is currently inside it ... could be anything.