Maybe you should ask for a raise.В  According to a recent study reported on by the Telegraph, a BlackBerry can add up to 10 days of extra work a year. The study also found that men find it more difficult to turn off their smart phone outside the office. Loyalty program Nectar Business interviewed more than 1,000 office workers to reveal the impact of technology on their working lives.

Some other interesting tidbits: One fifth of Brits interviewed say they leave their phone on all weekend. And of those that do turn it off, 22 percent still peek at work e-mail. About 24 percent of respondents said they feel stressed because they’re always on call. Well, at least we now know exactly how much overtime we should be getting paid for that feeling.