All sorts of gadgets are getting more popular and popular but these things eat a lot of energy. The British Energy Saving Trust found that by 2020, gadgets will account for 45% of the electricity usage in UK households.
The most energy-intensive devices appear to be flat-screen TVs and digital radios.
Paula Owen, author of the report called The Ampere Strikes Back, said household appliances currently consumed about a third of an average home's electricity.
But she warned this was likely to increase as a result of people buying more energy-intensive devices.
"Your old-fashioned, bulky cathode ray tube TV on average consumed about 100 watts of electricity when it was switched on," Dr Owen explained.
"What we are seeing now is a trend for much bigger flat-screened TVs. On average, we are seeing a three-fold increase in the energy needed to power these TVs.
"Pretty much in every other sector [such as fridges and washing machines], we find that as the technology moves on, the products get more and more efficient.