I have never been a big fan of battery powered speakers. Most do not live up to the hype, none provide anything other than peak power output - not RMS, and every battery powered system I've tested did not provide the sound quality that far less expensive AC powered sound systems enjoyed.

All the best,

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)