DELL 039YVGA00 Manuale Utente

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Q:  I  did  not  use  my  spare  battery  for  a  few  days.  Even  though  it  was  fully 

recharged, there wasn’t as much power left as a newly charged one. Why?

A: The batteries will self-discharge (1% per day for Li-ion) when they are not being 

recharged. To ensure a battery is fully charged, recharge before use. Always keep 

the  battery  inside  the  laptop  and  have  the  AC  adapter  connected  whenever 

possible.

Q:  I  did  not  use  my  spare  battery  for  months.  I  am  having  a  problem 

recharging it.

A: If you happen to leave your battery to go through an extended period of self-

discharge, say more than three months, the battery voltage level will become too 

low. The battery then needs to be pre-charged (to bring the battery voltage level 

high  enough)  before  it  automatically  (for  Li-ion  only)  resumes  its  normal  fast 

charge. Pre-charge may take 30 minutes. Fast charge usually takes 2-3 hours.

Power Management

Understanding Power Consumption

In order to fully utilize the power of your battery, it would be a good idea for you 

to spend some time acquiring a basic understanding of the power management 

concept from your operating system.

You can use the power options in your operating system to configure the power 

settings on your computer. The Microsoft

®

 Windows

®

 operating system installed 

on your computer provides three default options:

Balanced — Offers full performance when you need it and saves power 

• 

during periods of inactivity.
Power Saver — Saves power on your computer by reducing system 

• 

performance to maximize the life of the computer and by reducing the 

amount of energy consumed by your computer over its lifetime.
High Performance — Provides the highest level of system performance 

• 

on your computer by adapting processor speed to your activity and by 

maximizing system performance.