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Acer AS5745DG uses a large 9-cell, 99 Wh Lithium-Ion battery with 900mAh, which provides long operation. The battery is tall enough to lift the laptop about 2cm off the ground, but we didn’t mind since it provides for an angled keyboard.
Watching movies is not a problem since the batter will take up to three and half hours of high intensity lighting. If you turn on 3D, battery life will drop to slightly more than 2 hours. On the other hand, office work with an internet connection can last more than 5 hours on one charge.