Normal Mode; Rapid Charge Mode; Conservation Mode; Nighttime Charge Optimization - Lenovo Yoga Book 9i User Manual

Normal mode

Normal mode is the most basic charging mode. In normal mode, it typically takes 2 to 4 hours for the battery
to charge from 0% to 100%.

Rapid charge mode

If you want the battery to be charged faster than in normal mode, switch the battery charging to rapid charge
mode. The following table lists the estimated time needed for batteries in rapid charge mode to be charged
to 80% and 100% respectively.
Table 7. Estimated charge time for batteries in rapid charge mode
Mode Time needed to charge from 0% to 80%
Rapid charge Less than 1 hour
Note: The estimated charge time assumes that the battery is charged when the PC is in sleep, hibernation,
or powered-off state.

Conservation mode

If your computer is constantly plugged into an electrical outlet, consider switching the battery charging to
conservation mode. In conservation mode, the battery will not be fully charged. Instead, the battery's charge
will be kept within 75%–80%. This is beneficial to the long-term health of the battery.
Note: If you want the battery to be fully charged before bringing the computer to work, disable conservation
mode by switching the battery charging to normal or rapid charge mode.

Nighttime charge optimization

Some people follow a regular pattern when using their computers. They finish their workday with the
computer at a low battery charge level. They plug in their computers at night and need the battery to be fully
charged the next morning so they can unplug the computer and bring it to work. These activities happen at
approximately the same time each day. If this sounds like you, consider enabling nighttime charge
optimization for the battery.
Nighttime charge optimization affects battery charging during the night hours, the time when you're usually
asleep. When it is enabled, the computer regularly adapts its charging behavior based on observation of
when you plug in the computer at night and unplug it in the morning. During the nighttime, the battery is
charged to a particular range and is kept within that range for an extended period, before being further
charged to 100%. Nighttime charge optimization ensures safe charging during the night and is beneficial to
the long-term health of the battery.
Note: With nighttime charge optimization enabled, if you break your routine one day by unplugging the
computer much earlier than usual in the morning, you may find that the battery is not fully charged.
If the battery pack of your computer supports nighttime charge optimization, it can be enabled in Lenovo
Vantage, Lenovo PC Manager, or Lenovo Smart Engine.

Recover full battery capacity

If your computer is constantly plugged in to an electrical outlet and the battery rarely discharges, the battery
may not be charged to its full capacity even if the battery meter reports 100% charge. You can recover the
battery's full charging potential simply by discharging and re-charging the battery.
Step 1. Unplug the computer and use it until the battery charge drops below 20%.
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User Guide
Time needed to charge from 0% to 100%
Less than 2 hours