Clamped it using my DSO-201 oscilloscope, CE Electric Amp (clamp style) meter, and Fluke DMM.
Waveform had a little distortion but right before chipping, so this is my "uncertified" power rating... Lol
It had some pretty decent results:
Wired @ .5 ohms rising to 1.21 ohms
Starting voltage= 14.96v
Final Voltage= 12.52v
3844 watts & 12.52v @1.21 ohms
Rated 4300 @ 14.4, I'd say it easily makes that power imo...