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Toyota has not ruled out a switch from a super-capacitor to batteries as its means of storing retrieved power on its 2015 World Endurance Championship LMP1 contender.

Toyota Motorsport GmbH technical director Pascal Vasselon has stated that the concept of the revised TS040 HYBRID will remain the same as this year's version without specifying the choice of storage system.

He admitted that a switch to a battery pack, the technology used by Porsche on its 919 Hybrid, was a possibility.

"We are constantly comparing the two technologies to decide when is the right moment to introduce the battery," he explained.

"For us the battery has been on the radar screen for a long time: we are just waiting until the moment in our development that it can really be better than the capacitor."

Toyota expects to run the revised TS040 early in the new year.

Vasselon said that Toyota had clear targets to improve the TS040, despite its domination of this year's WEC.

"We know all our competitors will come back next year with packages that have a good chance of stepping significantly up: we do not think we can survive with what we have this year," he said.

"We know we need to improve and we have targets to improve, but it would not be a sound decision to change everything and re-start from a white sheet of paper."