This could be the next big upgrade for the Tesla Model S

The next iteration of the Tesla Model S could sport a more powerful battery.

A hacker found a mention of a P100D in the software that runs the cars, hinting that a Tesla with a more powerful 100 kWh battery could be on the way, the Washington Post first reported.

Currently the most powerful Tesla Model S on the market is the P90D — named for its 90 kWh battery that provides a 253-mile range.

The thought is that if the P90D was named for its 90 kWh battery, then it's reasonable to assume a P100D would mean a 100 kWh battery is in the works.

The hacker, Jason Hughes, tweeted at Musk about what he had found:

—Jason Hughes (@wk057) March 4, 2016

After running that code through a decoder, it comes out to P100D. 

For Tesla CEO Elon Musk's part, he didn't seem particularly flustered by the find. When Hughes' car started downloading a new software update against Hughes' wishes, he thought Tesla was punishing for the find. Musk tweeted back that wasn't his call and commended him for his hacking skills.

—Elon Musk (@elonmusk) March 5, 2016