No matter WHAT you're powering, it comes down to usage and availability. How much power is the amp drawing (using) (whatever kind it may be), and how much power does your battery charger supply. Know those factors and apply my drawing and you're good. If your numbers don't work out then rethink your design.
This is your project, you have enough information to complete it. If no matter what anyone says you're still afraid to move forward with it then why are you asking in the first place?!
Can your battery power your device for the duration you want?
Can your supply charge the battery while playing your device?
If not - then get a bigger supply. It's all in the numbers. And no, I don't care to engineer your project. Not unless you're willing to send me a check for my time and knowledge. Even with the very limited state of my knowledge, this project is one WELL WITHIN my ability. I'm resisting GIVING you the details. I HAVE given you the knowledge - that's what this website is for - learning something. By now you should have learned how to tackle this project on your own with hardly any further input from any of us.
This is your project, you have enough information to complete it. If no matter what anyone says you're still afraid to move forward with it then why are you asking in the first place?!
Can your battery power your device for the duration you want?
Can your supply charge the battery while playing your device?
If not - then get a bigger supply. It's all in the numbers. And no, I don't care to engineer your project. Not unless you're willing to send me a check for my time and knowledge. Even with the very limited state of my knowledge, this project is one WELL WITHIN my ability. I'm resisting GIVING you the details. I HAVE given you the knowledge - that's what this website is for - learning something. By now you should have learned how to tackle this project on your own with hardly any further input from any of us.