Esteban Gutierrez has given voice to his frustration after a problem with his Sauber once again cost him dearly.
With just seven laps to his tally in Friday's FP2 due to a problem with the MGUK, Gutierrez tried to make up for lost time in Saturday's final practice.
The Mexican racer was the busiest of all the drivers in the damp conditions, putting in 15 laps.
Hoping to put what he had learned to good use in qualifying, Gutierrez instead found his C33 grinding to a halt.
Sauber tweeted: "Esteban had to stop on track due to a problem with the battery pack."
The 23-year-old finished qualifying down in 20th place and said the constant car problems are not acceptable.
"Yes it is quite not acceptable to have a weekend like this," he said.
"It puts me in a very difficult position.
"It's already too many session that we have lost because of technical problems."
He added: "Something needs to change."