UK homes could make savings of up to £147 a year by turning off "vampire devices".
These have been described as electronic devices that drain power, even when unused.
Even while plugged in but switched off, they draw a small amount of energy which adds up over the course of a year, especially when added to the increasing energy costs Brits are experiencing.
Devices such as laptops, smart speakers and broadband routers are among the types of technology that use energy in this way.
Televisions are one of the most costly 'vampire devices.'
Nick Ansell
Some electronic devices continue to draw power despite being turned off.
Andrew Matthews
British Gas research shows £3.16billion is spent across the UK annually on keeping "vampire devices" on standby.
British Gas energy expert Marc Robson spoke to the BBC about how households can reduce the impact of these energy-drawing devices on their bills.
He says: "There are smart plugs you can buy which will let you check everything is turned off from your phone.
"At night, or when not in use, try switching off devices at the mains rather than switching to standby, as even the standby light on a television uses energy.
"Try not to overcharge your mobile phone and laptop unnecessarily.
"As soon as your device is charged, try and get into the habit of unplugging it.
"Not only will this save energy but it also prolongs battery life.
"A smart meter's in-home display can help to identify how much energy is used at different times of the day, so you can see where energy is wasted."
The British Gas research says £24.61 is spent on average yearly to keep televisions on standby, in addition to £23.10 for a set-top box from Sky or Virgin Media.
The cost per year of more "vampire devices" are outlined in the research.
- Microwave: £16.37
- Shower: £9.80
- Washing machine: £4.73
- Printer: £3.81
- Phone charger: £1.26