Was dusting off my tsunami to give it a round and I noticed after a few mins my battery got a little warm. I pulled it out, for safety reasons obviously and went back to the "drawing board " so to speak. Checked my coil resistance at .23 ohms. Fresh charged samsung 25r at 4.7v. This battery is rated at 20 amp. Ohms law calculations said I was pulling 18 amps so that leaves me a 2 amp leeway. Probably that's a little close and why the battery warmed up some after a bit of use. I should probably beef up my coils on the next build, I think.