iPod Touch 7th Gen Battery issues

[whiteowl4]

IPod Touch is 4 months old (under warranty). Battery health is 100% (20 cycles completed) but backup is only 1-1.5 hour if I surf and watch videos. Service centre says since health is 100% they won't do anything. But backup is too less. What are my options?

 

[Mars20]

It will take longer to back up if you are using the internet bandwidth to surf and download videos at the same time. Just try backing up when you aren’t using it.

 

[whiteowl4]

By backup I mean battery backup. The battery is getting discharged after just 1.5 hours of web surfing and streaming.