In many cases, you will have to remove the battery pack to find the number.

Sometimes it may be necessary to remove the battery pack to find the number.

They can run on battery packs, which makes them portable.

Power is a challenge; we generally provide extra battery packs.

The battery pack would power the radio for up to 20 hours.

At least they'd brought a new battery pack for his radio.

When the power goes out, the battery pack takes over.

He turned it over to get at the battery pack.

The battery pack, which provides a source of electrical power.

She uses him as a sort of human battery pack.