My radio battery failed just as Cameron was answering the first question.

He had certainly slipped up in not checking that the radio batteries were charged.

However, radio batteries run down and, along with many other things, would have to be replaced during our two weeks of being self-sufficient.

His crew discovered before Sunday's race that his radio batteries were dead.

Even if it's been in place for years, the radio battery is fully charged every time we start our engines.

He and his tiny coastwatcher contingent were running low on everything they needed: food, supplies, and most critically, radio batteries.

We found nothing, apart from a radio battery hidden under the stove.

At least by then he ought to have an explanation, but for now he wanted to make sure the radio battery was fully charged.

These 25A generators were initially thought sufficiently powerful to supply and charge the radio batteries directly, no longer needing the separate charging set.

They went in their houses and took everything they wanted to, the food and the radio batteries and all.