Andy Burns wrote:
MM wrote:

I ordered a Ring Automotive RAC610 12V Analogue Compressor

I bought a Halfords switching
power supply model RL-816U, with the following spec:
DC Output: 13.6V +/- 5A 68W

elsewhere, I see the compressor is 85W

Why not run it from the car's cigar lighter? (with the engine running to
avoid flattening the battery).

+1. Can't quite see why you wouldn't want to just run it from your car's
battery.

Tim