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Chapter 2. New Features
9
Hybrid Power Supply (For IdeaPad U400 series only)
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A hybrid power supply system incorporates a power adapter and battery pack to power a
computer. With the hybrid power supply technology, the system continuously monitors the
power level required by the computer. When the required power level exceeds what the power
adapter can supply (for example, when Intel Turbo Boost Technology is enabled), the power
adapter stops charging the battery pack and the battery back starts to power the computer as
well.
Battery Protection
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If the battery pack remains idle for a long time, the battery may be over-discharged, and its
degradation speed may be increased. The battery pack of IdeaPad U series uses the battery
protection technology. When your computer remains idle for a long time, the battery pack enters
the sleep mode to avoid over-discharge. After the battery pack enters the sleep mode, you
cannot turn the computer on without using the power adapter. Please connect the power
adapter to the computer to activate the battery pack.
Quick Charge (For IdeaPad U300s series only)
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U300s incorporates the function of quick charge. This function achieves the best result in the
power-off mode, when it takes about 40 minutes to charge the battery from 0% to 70% of full
power.
Note: The computer must be connected to the power adapter when the hybrid power supply is enabled.
When the hybrid power supply is enabled, the power adapter and the battery pack work together
to power the computer. Then, you may note that the power level of the battery pack becomes
lower. When the hybrid power supply is disabled, the power adapter resumes charging the
battery pack.
Note: The batter pack is in the sleep mode by default. When you use the computer for the first time,
please plug the power adapter into it. Otherwise, the computer cannot be turned on.