When you go to sleep one night leave the notebook on without the AC adapter connected. I guaranty when you wake up the next morning the battery will be discharged. No need for any special LED lights to do what the notebook does by itself.

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@Ed C wrote:
When you go to sleep one night leave the notebook on without the AC adapter connected. I guaranty when you wake up the next morning the battery will be discharged. No need for any special LED lights to do what the notebook does by itself.

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I cannot agree with you. LED current consumption is about 10mA.
Notebook's minimum current is much greater. So If my battery cannot provide more then 250mA (this value is just to ilustrate the problem - I don't know the exact low limit), notebook will shutdown (but the battery isn't completely empty yet).

That is why I want to use LEDs. Of course I will discharge battery using notebook without AC adapter connected.

I will try to recharge the battery using direct 14.8 DC power supply (not using notebook), because I assume that there is an inteligent charge circuit inside the PC, which doesn't let me charge battery to its full capacity.

Thanks for your reply,
Pivo pijem

If you do some research on Li-ion batteries it is NOT suggested to completely drain them. But I guess that is up to you.

Also you can set the system to NOT shut down when the battery gets low.

Also these batteries are supposedly SMART so you might need to jumper out a pin that tells the battery it is in the notebook. Otherwise it might not drain it at all.

Most likely, you have nothing to lose, because the battery is on its way to needing replacement. Lithium batteries last 300-500 charge cycles or 18-24 months, so given the age of the 8200, chances are it's on its way out anyway.

Deep discharging the battery is not recommended as noted. One deep discharge can permanently damage a lithium battery. Turn off the power management, let the battery discharge, and try charging it. If the run time increases, great - more likely, it won't, in which case a new battery is in order.

Not really. If use doesn't get the battery, age will. To extend the life of a lithium battery, never allow it to overheat and don't deep discharge it.

The technology provides a lot of energy for its mass - but it's still relatively fragile. Age, as much as anything else, will hasten the demise of a lithium battery.

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@ejn63 wrote:
Most likely, you have nothing to lose, because the battery is on its way to needing replacement. Lithium batteries last 300-500 charge cycles or 18-24 months, so given the age of the 8200, chances are it's on its way out anyway.

Deep discharging the battery is not recommended as noted. One deep discharge can permanently damage a lithium battery. Turn off the power management, let the battery discharge, and try charging it. If the run time increases, great - more likely, it won't, in which case a new battery is in order.

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Thanks.
I'll try this before anything else.

Just one more question!
Can I extend battery lifetime if I remove module while I am using AC Adapter as a power supply. At least once in a week it will be fully discharged and recharged.


Thanks,
Pivo Pijem