Energizer, the UK's number one battery brand, is livening up the box with a £2m Christmas TV advertising campaign starring Ultimate Lithium. To mark the launch, Energizer is offering 10 lucky winners £50 worth of Ultimate Lithium batteries - the world's longest-lasting battery.

The two-month national campaign reintroduces the successful tagline 'It's what inside that counts', championing the role of hi-tech batteries in modern devices. The ad is on until the end of January across multi-terrestrial and Sky channels.

For your chance to win, fill in the coupon on page 45.