The phone's built-in battery is large enough to power the phone for 330 minutes, or up to 300 hours if left in stand-by mode.

It's also the only one with built-in rechargeable batteries (they can play for about three hours per charge).

On the other hand, the m130 is the first in this inexpensive series to offer built-in, rechargeable batteries - and color.

Its built-in rechargable battery can play for 5 1/2 hours.

The built-in battery lasts for 20 hours on a charge.

But it costs nearly $6,000 and runs only one and half hours on the built-in battery.

A built-in rechargeable battery and charging station come with it.

The built-in battery will last about two hours on one charge.

In my test, with screen brightness at full and two applications running, the built-in battery lasted 4 hours 14 minutes.

Power came from built-in rechargeable batteries, which lasted up to 28 hours on full charge.