It might feel like your iPhone spends the better part of its life plugged into the wall, trying to recoup enough juice to make it through the next Facebook post - but the taxing issue of recharging your handset costs you a great deal more in time wasting than it does cash.
Forbes has put together a survey of the costs of household electricity use, comparing the charging of battery-powered devices with white goods and heating requirements.
Heating water (which accounts for 18 per cent of the average home's energy bill) drips in at a cost of around £425 per year, while heating a home amounting to a wallet-draining £710.
Topping up the 1,440mAh battery of an iPhone 5? It only requires 2,000 watt-hours of energy per year - or about 28 pence.
Yep. Your smartphone companion only bleeds 28p from your pocket every year.
And your tablet? Charging an iPad equates to approximately 12kWh per year - or £1.70.
So should an establishment give you grief about charging up your device through one of their unused sockets, just hand over your spare change. It'll more than cover the cost.