I was going to say just use a spring clamp as it has auto-shutoff but that's no good if it leaks. You've justified my decision to buy the DeWalt though with it's one button operation and no leaks.The Makita requires you to stand there and hold the trigger, though. Our house brand one doesn't, but you can't leave it unattended anyway because as soon at it reaches the desired pressure and turns off, air starts leaking back out through it so you'll come back to a tire with less air in it than when you started.
How long did it take (and what pressure did you start)?It had no problems reaching 4.5 bars.
Does the Makita turn off automatically though? I understood it the way that the Chinesium one does, but the Makita doesn't... or just wait until the battery dies I guessWhoops, skim read it. Sorry.
In that case, just get yourself a spring clamp or mini quick-grip clamp for the Makita's trigger and you're all set!