Reference Guide

About your computer
This section provides more information on the components which can be found in your computer.
Power adapter
Power adapters are used to supply power to portable computers, tablets, and certain desktop computers. The Dell power-adapter kit
consists of the power adapter and the power cable. The power‑adapter rating (90 W, 65 W, and so on) depends on the device it is
designed for, and the power cable varies based on the country where the power adapter is shipped.
CAUTION: To avoid damaging your computer, it is recommended to use only the power adapter shipped with your device
or a Dell‑approved replacement power adapter.
Battery
Batteries are classified by their power ratings, such as 45 WHr, 65 WHr, and so on. The battery allows you to use your device when
it is not connected to a power outlet. The life cycle of the battery is the number of times it can be discharged and recharged without
affecting the operating time significantly. After the battery life-cycle reaches its end of life, you must replace the battery. Depending
on the computer model, the battery on your computer may be user-replaceable or may require a Dell service technician to replace.
NOTE: High-capacity batteries generally have a longer life-cycle, since you need to charge high-capacity batteries less often
compared to low capacity batteries.
NOTE: For tips on improving the battery life, see Improving battery life.
NOTE: Dell Power Manager feature is not supported in Alienware systems.
Coin-cell battery
Coin-cell battery provides power to the Complementary Metal‑Oxide Semiconductor (CMOS) chip while the computer is turned off.
The CMOS chip contains the time, date, and other configuration information about your computer. Under normal usage conditions,
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