Hi On replacing the battery in the SQ1 Plus the battery warning should disappear by it's self. I replaced my battry with a holder and seperate battery as well, works a treat! If I remember correctly the old battery was a tight fit so maybe the through hole plating in the PCB is damaged! I take it yo...

Hi

Are the 8 keys in a pattern or is it 8 consecutive keys? You can set the 8 tracks on the sequencer to Local, MIDI or Both. To record on a PC you need to make sure it's not set to local. If the machine is fully functional I would keep it as it is easy to program and has some great sounds.