just get a decent hand pump and a coil of plastic connected to a cold main. fill up on the cold main, isolate and then pump up with the pump test and then flush and drain. should only take 2-3mins to pump up. quicker than an electric one imo and you dont need any power and alot of cash. leave a gauge on the test and remove the test pump and put it away so it cant get nicked.
and not having to worry about it getting nicked(the electric tester) while you lagg and trac tape up helps too.