Honda is aiming to offer McLaren full use of its energy recovery system [ERS] at the Hungarian Grand Prix.

At the British Grand Prix, McLaren racing director Eric Boullier told the official Formula One website that the MGU-K part of the Honda ERS, which recovers energy from the rear axle under braking for extra power on the straights, was not operating at its full potential in races.

"If you can deploy your MGU-K power on the straights on every lap, that is worth a lot of time. Today we can't do that," Boullier said.

However, Honda motorsport boss Yasuhisa Arai is hoping to offer both drivers full use of the ERS in Hungary.

"Our goal is to end the first half of the season with precise energy management and full use of the ERS to enable the drivers' skills to shine through at this circuit," Arai said. "Due to its lack of long straights and full-throttle sectors, this track is less strenuous for the power unit compared to most circuits.

"However, the frequent undulation requires more precise energy management and deployment at lower gears and corner exits. Getting our energy management settings right will be crucial throughout the weekend."

Jenson Button says there is no question about the effort being put in by both the McLaren chassis side in Woking and the Honda development engineers in Japan, but feels the team needs a good result ahead of the summer break.

"There's been absolutely no let-up on the technical side - having personally seen the effort that's been going on at MTC, and heard about the work that's being done at Sakura, I know we're slowly but surely getting there.

"Of course, that's difficult to substantiate without decent results, but let's hope we can go into the summer break feeling confident about the second half of the season."