Our new video series, How It Works, breaks down the basics of our every day technology. This episode reveals how a battery works and explains the science behind why they go flat.
Get the latest headlines: www.telegraph.co.uk/
Subscribe: ukposts.info_c...
Like us on Facebook: / telegraph.co.uk
Follow us on Twitter: / telegraph
Follow us on Google+ plus.google.com/1028913550727...
Telegraph.co.uk and / telegraphtv are websites of The Daily Telegraph, the UK's best-selling quality daily newspaper providing news and analysis on UK and world events, business, sport, lifestyle and culture.