I'm converting audio speaker to run on batteries. the speaker is Stagg SMS 8p - RMS 90W, peak power consumption 200W which is consistent with 1A fuse for 220V.
Say I go with 12V battery - peak current would be under 17A. If I choose reasonably priced 20C Li(Fe)Po modules -> I can get this current from relatively small 1Ah battery.
My question is -- if I set the volume to maximum non-distorted level -- how much time would I get playing 'typical' music. Preferably advise a software to which I can feed my playlist and get peak-to-average power ratio.