If those ratings are honest, the 25C 5000mah shouldn't have any probs. I'd believe the 3800 would be able to run your setup as well, it just has a little less cushion. Run it and check lipo temp a few mins into the run - if its getting hot, it can't supply enough amps. That's prob beacuse the rating is optimistic. There's no standard way to rate lipos and one companies 30C is another companies 25C or even less in some cases.