Use laptop on battery or mains

  GBL 20:58 18 Mar 2011
Locked
Answered

Should I use my laptop on the mains with the battery connected or not??

I normally use the laptop at home where mains is no problem.

  robin_x 21:05 18 Mar 2011

Strictly battery life is reduced.
Supposed to remove it and put in fridge or cool place!

Many (including me) don't bother. If it only lasts 2 yrs not 3 then that is down to me.

Detailed stuff here.
click here

  robin_x 21:23 18 Mar 2011

Cut and paste of stats on laptop. Bought Nov 2009.
Battery always in. Runs on mains.
Dunno how this will display when I post reply.

============================================
Sensor Value Min Max
LAPTOP2009
AMD Athlon II M300
Temperatures
Core #0 56 °C (133 °F) 56 °C (132 °F) 60 °C (140 °F)
Core #1 56 °C (133 °F) 56 °C (132 °F) 60 °C (139 °F)
Powers
Processor 5.47 W 5.47 W 13.35 W
SAMSUNG HM250HI
Temperatures
Assembly 40 °C (103 °F) 40 °C (103 °F) 40 °C (103 °F)


Air Flow 40 °C (103 °F) 40 °C (103 °F) 40 °C (103 °F)
Battery 1
Voltages
Current Voltage 12.31 V 12.31 V 12.31 V
Capacities
Designed Capacity 47520 mWh 47520 mWh 47520 mWh
Full Charge Capacity 42854 mWh 42854 mWh 42854 mWh
Current Capacity 42854 mWh 42854 mWh 42854 mWh
Level
Wear Level 9 % 9 % 9 %
Charge Level 100 % 100 % 100 %

  GBL 21:33 18 Mar 2011

Thanks for that, I have never given it a thought before, but have just bough a new laptop. I will take the battery out.

Take care.

  mooly 07:38 19 Mar 2011
Answer

Sorry to dissagree...

Firstly the battery is a safeguard against power glitches/brownouts. It's essentially an uninteruptible power supply that could prevent hdd/file system problems if the mains dropped out.

As to battery life. LiOn batteries deteriorate from the day of manufacture, and yes temperature is a big issue.

From a a practical point (speaking as an electronics tech) I would leave the battery in all the time. Use the battery occasionally discharging right down to perhaps 5% or so every month.

My own battery (Acer 4.5 year old) has no noticeably loss of life following this pattern.

Battery charging for laptop batteries is extremely well controlled... once charged in the laptop they are not continually trickle charged as many think... the battery chemistry doesn't support that mode of use... and charging is terminated until the battery naturally loses a few percent of its charge, whereby it is topped up again.

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