12v Air Compressor - well impressed.

[TimberCutterDartmoor]

But given that you'd need around 30 amps at 12v you're not likely to get anything much smaller.

 

I've got one of these compressors and am quite tempted to see if I can get a small receiver and pressure switch to go with it.

 

There's a co making them near here; I've ordered one - will post pics once done