It's all my own stupid fault but halfway through Led Zeppelin's - Dazed & Confused my Cherry Sunburst JTV-59 suddenly changed sound and tuning so I looked down and realised the battery had died. Luckily we were in a part where a little bit of jamming was appropriate and I swapped for my Tobacco Sunburst JTV-59 and continued. We play in Eb but I tune normally and drop it to Eb so that's why I went out of tune. A few songs later we're playing Black Sabbath by Black Sabbath and the battery on that one died so we extended the quiet bit a bit longer while I tuned down to Eb and was able to finish the night.

Two lessons learned -

1) Check batteries

2) Tune to Eb just in case.

Anybody else got a live gig Variax horror story?