George Russell believes Mercedes has finally uncovered the reason behind the energy management problems that disrupted his recent Formula 1 weekends, allowing him to return to a more natural driving approach heading into the Hungarian Grand Prix.
The Briton endured a frustrating spell at Silverstone and Spa-Francorchamps, where he found himself struggling to extract the expected performance from his Mercedes.
At Spa, the issue reached a peak when Russell ran out of battery power on the Kemmel Straight before his race ended after a contact with Lewis Hamilton at Turn 5.
For several sessions, Russell had been searching for answers by adapting his driving style, trying to understand how he could better work with the car and match the pace of teammate Kimi Antonelli.
But after a forensic analysis of the data, Mercedes discovered the problem was not behind the wheel – it was buried within the power unit management system.
Calibration issue behind Mercedes' energy imbalance
According to Russell, the team identified problems with how electrical energy was being deployed across the lap. Due to a discrepancy buried deep within the unit’s software code, the system was releasing too much energy early on, leaving the car short of electrical assistance later in the lap when it was most needed.
"Effectively there were numbers on the screen that were not quite calibrated properly," Russell explained. "So it's not like the hardware is wrong or there's a problem with the hardware. But there were two issues in Spa as well.
"I think the deployment was not quite deploying optimally across the lap. We saw this with Piastri as well, who had a similar issue. So that was one of my problems.
"But then on top of [that], we had something separate. It was all linked to the same calibration being not quite right. I'm not going to say simply numbers on a screen, but now we know which numbers potentially were not correct.
"We can rectify that, recalibrate things, and give the power unit performance at its full potential."
The discovery comes as a major relief for Russell, who had been questioning his own approach after data appeared to suggest his driving style was contributing to Mercedes' struggles.
Russell ready to stop second-guessing his driving
The 2026 championship contender admitted the search for answers had become mentally draining, with every input behind the wheel being scrutinized – from throttle application to gear selection.
Rather than simply focusing on extracting maximum lap time, Russell found himself trying to compensate for what turned out to be an incorrect diagnosis.
"Yeah, it's a huge load off my mind," he said. "But also while I'm driving, to be honest, because throughout some laps in Silverstone and then throughout the majority of Friday and Saturday in Spa, I was thinking about how I needed to drive to make the power unit fast in the straight, how I pick up the throttle, the gear usage, how early I am before throttle.
"The data was telling us that was probably the reason, but it turned out it wasn't the reason. So all of that effort over the course of three sessions trying to re-optimise my driving around a new technique was kind of for nothing.
"So I'm looking forward now to going into a weekend where I can just try and focus on driving fast, focus on the simple things.
"I know that is when I perform at my best, but we're not in a simplistic sport, so saying let's just solely focus on the simple things is easier said than done sometimes."
With Mercedes still firmly in the hunt at the front of the grid, Russell believes the Hungarian Grand Prix will provide a clearer picture of where he truly stands once the energy issue is removed from the equation.
After spending recent weekends adapting himself to a problem that was not of his making, the Briton can now return to the fundamentals that have traditionally brought out his strongest performances: confidence, consistency and pure speed.
Keep up to date with all the F1 news via X and Facebook
