Top 10 tech irritations

Today's laptops still rarely get more than five hours of battery life (much less if you do anything useful). While converged smartphones (with Wi-Fi, Bluetooth, GPS and GPRS/EDGE competing for power) often won't last more than 36 hours without a sneaky top-up charge. Poor battery life is the thorn in the side of the Nokia N95 and, if you surf the web a lot, it rubs some of the shine off of Apple's iPhone 3G. Where are those hydrogen fuel cells we've been promised?

5. Early obsolescence