Built-in Battery Holder.

内建的电池座。

Built-in Battery Gauge.

内建的电池电量。

MFJ-299 has a built-in battery check circuit.

MF J - 299有一个内建的电池检查线路。

This product using solar-powered, built-in battery to use environmentally-friendly batteries, saving energy also played a role in environmental protection.

本产品用太阳能供电，内置蓄电池使用环保电池，既节省了能源又起到了环保作用。

It featured a touch-sensitive screen, with a built-in battery. Once tilted on its built-in stand, it could be used as a desktop computer with the attachable Folio keyboard.

Macintosh Folio带有触摸屏及内置电池，当使用它的附属支架立置时，可以连上Folio外接键盘当作台式电脑使用。