It needs new batteries.

Do you sell batteries?

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

The battery died.

The clock has run down. I need new batteries.

I got a new battery put in my watch yesterday.

I have to change the batteries in the radio.

By the way, do you have any spare batteries?

But while I am here, do you think you could replace the batteries?

This battery is charged.

How long will this battery last?

This flashlight needs two batteries.

This computer runs on batteries.

This toy car runs on batteries.

May I have some camera batteries, please?

Since I installed solar panels on my house, my energy bill has been cut in half.

My phone is out of battery.

The battery is flat.

“Yikes, my battery’s nearly dead.” “You should have charged it overnight while you were sleeping.”

Oh no, my mobile phone battery's about to run out. I should have charged it while I was sleeping.