No I wouldnt ever rely on the numbers. 850a in our application is outrageous even for max burst. I mean do they think we are idiots? Even for a huge 1/5 setup wouldnt see close to that from a lipo I reckon. But they can be used to get into a proper guesstimate range of whats going on. The numbers can be trusted to a degree with the very best companies, which is what I run only.