Hewlett-Packard (HP), the world's largest computer company, has developed a new generation of laptops with a 24-hour battery life.
Its new HP EliteBook 6930p can be configured with an ultra-capacity battery to deliver "all-day computing".
The firm says the 24-hour battery means travellers can take more than 10 trips on the Eurostar between London and Paris before recharging their laptop.
