OK, I take it back. There has been a change in the rules.
http://www.formula1.com/inside_f1/rules_and_regulations/sporting_regulations/8689/fia.html
Article 28.4.
Interestingly, the ES is now a homologated part of the power unit, which will prevent any in season developments in battery technology .
http://www.formula1.com/inside_f1/rules_and_regulations/sporting_regulations/8689/fia.html
Article 28.4.
Interestingly, the ES is now a homologated part of the power unit, which will prevent any in season developments in battery technology .