China’s BYD wants to show people that its new Flash charging tech doesn’t just make good headlines.

The company deep-froze a Denza Z9GT luxury EV for 24 hours at -22°F.

Then, the car’s second-generation Blade Battery was fast-charged at 1,500 kilowatts.

China’s BYD made plenty of headlines when it debuted its second-generation Blade Battery and latest-generation Flash chargers. When combined, the two can make EV charging basically as fast as getting gas, with up to 1,500 kilowatts going from the DC fast charger to the lithium iron phosphate (LFP) pack.

In ideal conditions, BYD’s latest EVs can charge from 10-to-70% in roughly five minutes, and from 10-to-97% in under 10 minutes. Now, though, the company wants to prove that its charging solutions can happily withstand freezing temperatures, where conventional batteries usually struggle with power.