Mr modnaR wrote:i believe the power requirements are too high for a battery. well, one that exists today, anyway. 19W i think it is. this would equate to about 12.6Amps at 240V which is fairly high for a consumer device. have a look out there, though, there may be a laptop battery that could cope.
i could be wrong but this doesn't sound right. i sell 1000w grow lights and they only run 4.8amps @ 240v. i don't see why 19w would run at 12.6amps, maybe 1.26amps sounds more like it to me. i don't care either way though, i wouldn't use an external battery unless it was approved by akai. good luck.