SanDisk introduced the SanDisk Ultra II Mobile line of flash memory cards for multimedia-enabled mobile phones. The SanDisk Ultra II Mobile memory cards have faster read and write speeds than standard flash memory cards, as well as longer warranty periods. Faster read/write speeds improve performance of the card for file transfer and play on personal computers. Also, they may reduce the energy consumption on the batteries of certain phones and are expected to accommodate performance requirements of future mobile phone models.