how long should battery charge last on ipod 7 gen when playing music on spotify app

Thanks for getting back to us, chernask,

To look into your battery further, we would recommend that you Contact Apple Support.

Take care!

Hello chernask,

We understand that you have some questions related to the iPod Touch's (7th generation) battery. While we cannot give you a number when it comes to specific apps, the iPod touch - Technical Specifications - Apple states that estimated amounts are, "Music playback time: Up to 40 hours". This can vary depending on the device's age, temperature, and usage of other apps at the time.

Thanks for using Apple Support Communities!