It doesn't work so well because the batteries are running down.

It doesn't work so well because the battery is low.

Basically, by controlling the genes, you can control multiple materials to improve your device performance.

And we've all heard of charge.

And you can do it the same, over and over again.

I'm looking for batteries.

The battery is flat.

battery dead.

And computers don't go to sleep.

Crap, it's burnt out.

This is an overview of the solar cell prototype.

And the battery runs on a... a chemical reaction.

Do you sell batteries?

The battery.

Battery's the power source.

So something I think is very fascinating is

Phone's dead.

You see, the battery is the key enabling device here.

Now this is the simplest motor on Earth.

This computer runs on batteries.

This battery is charged.

Oh, shit, man. Your battery's dead.

We wanted something that was really affordable.

Took a few photos. I got my satellite phone out.

(Music)

Today I want to tell you about such a device.

May I have some camera batteries, please?

Please give me batteries for a camera.

We call this our sushi circuit. It's very popular with kids.

My battery dead.

Roaming drains the battery. All right.

It needs new batteries.

A giant battery could.

We've recently discovered this. Do they do it by friction?

This flashlight needs two batteries.

Batteries must be running down.

Three of the four cells are gone.

You forgot the batteries?

Lithium. Like camera batteries. Odd.

So that's kind of the vision that I've been thinking about.

Batteryoperated pith helmet, with fan.

Either the battery's dead, or her cell got damaged somehow.

You're not even looking at lithium ion, you're looking at cheap batteries. You know, you're

(Knocks)

The battery died.