Charge laptop battery always when in use ?

Lenovo / 59018309
December 22, 2010 at 20:35:31
Specs: Window xp sp 3, Dual core /2 GB
Is is safe to use the battery charger always in a notebook even if the battery is fully charged. Will it damage the battery ??

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December 22, 2010 at 22:59:22
... shops/stores tend to remove the batteries with laptops turned "on"
(why not run off the mains adapter?)

... maybe for different reasons, you'd think there'd be a "fail-safe" switch built-in
(but is there?)

... re-charging a battery that is'nt discharged was not recommended in the past!
(perhaps think of life-span + cost)


... Posting is provided "AS IS" with no warranties

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December 23, 2010 at 00:37:57
Most stores remove the batteries from computers and cameras to keep them from 'walking away',

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December 23, 2010 at 01:30:33
Yes it is safe. However, it is good practice to occasionally run on battery and let it run down to minimum (i.e. when you get battery low warning) and then recharge. I believe it is better for the battery this way.

Taking the battery out is an option if you are permanently using AC power as you will preserve battery life.

When everything else fails, read the instructions.

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Related Solutions

August 5, 2011 at 05:37:26
Batteries are drained whether you use them or not.

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August 5, 2011 at 07:56:25
Yes it is safe to leave the charger on all the time.

Modern litium ion technology is nothing like the old days of NiCads and nickel metal hydride technology. The same rules do not apply.
Lithium ion does not have a memory effect like the old NiCads and nickel metal hydride so you don't need to fully discharge before charging.
There are fail safe circuitries inside the batteries. With lithium ion, they are monitored very closely by the charging circuit.
Taking the battery out will not preserve life. You have a certain amount of charging cycles in a lithium ion. The average is 1000 full cycle charges. But you can also charge it 2000 times with a 50% charge 10,000 with a 10% charge, etc so even if you leave the battery in, it may trickle charge but it still follows the rule of how many times it can be charged.
"re-charging a battery that is'nt discharged was not recommended in the past"
That was the past. Lithium ion batteries are different then NiCads and don't follow that rule.

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