powertrain are also smaller and more efficient. Toyota estimates the new inverter, motor and transaxle are 20 percent lighter. It has a 1.3 kWh nickel-metal hydride (NiMH) battery. ZVW35: plug-in version The Prius Plug-In Concept was shown at the October 2009 Tokyo Motor Show, the 2009 Frankfurt Motor Show, and the 2009 LA Auto Show. Toyota produced a limited number of Prius Plug-in Hybrids for a global demonstration program. The plug-in demonstration version is based on a third generation Toyota Prius outfitted with 5.2 kWh lithium-ion batteries, with an all-electric range of . The global demonstration program involving 600 pre-production test cars began in late 2009 and took place in Japan, Europe, Canada, China, Australia, New Zealand and the United States. The production version of the Prius Plug-in Hybrid was unveiled at the 2011 Frankfurt Motor Show. Modifications from the demonstration vehicle to improve efficiency allow the production plug-in to achieve an all-electric range of with a smaller 4.4-kWh lithium-ion battery. The Prius PHV was released in Japan in January 2012, deliveries in the United States began in late February 2012, and in the European market in June 2012. Safety The IIHS rated the 2010 Prius as Good except for side-impact "structure/safety cage", which was rated Acceptable. In Euro NCAP testing, the Prius was given an overall rating of five out of five stars. Recall On February 9, 2010, Toyota announced a voluntary global recall of third generation 2010 Prius models manufactured from the current model's introduction through late January. Affected models, including 133,000 Priuses in the U.S. and 52,000 in Europe, are to receive an anti-lock brake software update to fix brake response over rough roads, following reports of delayed braking response on certain surface conditions. Apple co-founder and Prius collector Steve Wozniak was also quoted by media outlets regarding a possible cruise control issue on one of his several Priuses, where the steps for "upping the speed" using the Dynamic Radar Cruise Control system allegedly caused unintended acceleration. Wozniak later maintained that he was misquoted, but did have an individual vehicle and customer service issue, while auto journalists and other Prius drivers suggested user error. On March 8, 2010, a publicized incident of alleged Prius acceleration in San Diego was later suspected to be a hoax or not repeatable. The manufacturer shared that 713,000 Prius in North America, 997,000 in Japan, another 130,000 in Europe and the rest