Warning over exploding batteries on planes
4 February 2014 Last updated at 00:33 GMT
From cameras to e-readers and laptops, the average passenger aircraft now has dozens if not hundreds of electronic gadgets on board.
But there are warnings that their lithium batteries could pose a serious threat to aircraft safety.
The Civil Aviation Authority, which regulates safety, has told the BBC it is especially concerned about cheap, copycat batteries, which are often bought online.
Even a small camera battery is powerful enough to explode and start a fire that could have disastrous consequences.
Transport correspondent Richard Westcott reports.