Exploding battery
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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.