And the Hello,

welcome to the Naked Scientists, with me Chris Smith and also with Cat Arnie.

Hello, and this week we're looking at making better batteries to find out if scientists can help

your phone download just one more app before it dies.

Plus in the news, switching off paralysis from spinal cord injury and the chances of

finding life on Saturn's icy moons. The Naked Scientists podcast is powered by

UKfast. Co. UK.

Now before we kick off with the news, a quick quiz question for you.

Can you tell us what voltage do you normally get out of what we call an

AA battery if you think you know the answer email Chris at the naked scientist

dot com or tweet at naked scientists.

News time now, and this week scientists have found a way to trigger nerve cells in the spinal cord to regrow when they're damaged.

Ultimately, this might help patients who have been paralyzed by spinal injuries

to regain some control over their bodies.

Neuroscientists Simone de Giovanni from Imperial College in London has been

leading the work and he's with us hello hello

first of all why is it such a problem when people injure their brain or spinal cord

why doesn't it naturally regenerate?

Well following spinal cord the brain injury nerves do not regenerate and this leads to disability

which can be really very, very severe and long lasting, potentially forever.

But when someone injures, say, their fingers or their arm,

if someone has a horrible accident and has a body part reattached,

...