Each submarine is equipped with three Garden Island-Hedemora HV V18b/15Ub (VB210) 18-cylinder diesel engines, which are each connected to a 1,400 kW, 440-volt DC Jeumont-Schneider generator [REF].
Electricity is stored in four lead-acid battery packs, totalling 400 tonnes, assembled by Pacific Marine Batteries, a joint venture between VARTA of Germany and Pacific Dunlop of Australia [REF].