It happened to Total MK only last month – you are in the middle of a field making the most of festival season, and everything is going great guns – while your cell phone has power.
But when it runs out of juice?
At best it's an annoying niggle. At worst? You can't connect with your pals, make that essential call, take that festival snap...you know the sort of thing.
Incredibly, since Ernie Wise made the first mobile telephone call in the UK just 30 years ago, they've become extensions of us. Essential devices. Mini lifelines.
And when that power is lost, you'll not find a plug socket among the blades of grass.
But if you have this quirky compact charger tucked in your bag, a run down battery will never be a problem again.
The power bank is a portable charger and desk stand in one, perfect for smartphones and tablets.
Charge using the micro USB cable supplied – it takes around an hour. Then you keep the small power bank to boost your devise using your desired cable.
The charger also has a silicone case with a suction stand, which transforms the charger into a desk stand for your smartphone. Compact and cool.
The stand retails for £15 at Debenhams, or you could try your luck in this week's competition – we have three up for grabs.
To be in with a chance of winning, simply like our Facebook page https://www.facebook.com/pages/Total-MK/1543865425898411, and then email your name and address to info@totalmk.co.uk putting 'Super Charged' in the subject box.
The competition closes on Sunday, July 26, 2015 and the first three entries picked at random will each bag this small device which is a big help!