Tell me please, should I remove the hp compaq nc6400 battery if the notebook is on AC mainly and just about once or twice a week on battery power?

And some other essential questions:

1) As I know, full discharge of Li-Ion battery is harmful for it – so I think that 3% charge shown by Windows or HP laptop Battery check is about 20% of real, physical charge-so full discharge is impossible- am I right?

2) When I turning my notebook off for the night time, I unplug the hp compaq nc6400 charger off the AC too – is it right?

3) So, when the notebook is off or hibernated it shouldn’t consume any power, but when I turn on the notebook after night – the charge level is not full – (I guess that that it’s a normal physical process somthing like internal resistance or else) – but when the AC is back, the battery begins charging – so if this miserable charge counts by the hp nc6400 battery controller as a new lifetime charging cycle or not?

4) Maybe it is more reasonable to keep the notebook always on AC without removing the battery and the controller will switch the charging device off when the battery doesn’t need any more of charge? But wouldn’t it decrease the battery’s total capability faster?

5)Is it important – how many percent charge left in laptop battery when I begin charging it? Or I should discharge it by the time the notebook switches off and can’t start?

Maximum compaq nc6400 battery life results from keeping it cool – and at below 50% charge when not in use. When it’s in the laptop, it should chage to 100% and may remain warm after charging as a result of heat from the machine itself. So the answer is yes – except that if you need to use it on battery power a couple of times a week, you’ll need to remember to reinsert it to get it fully charged before relying on battery power.

1) The battery will automatically stop itself from discharging at a “safe” voltage.

Full discharge is not impossible – it will happen but very slowly over time if the hp compaq nx6110 battery is stored – due to natural discharge internal chemical reaction and the fact that it is powering its internal electronics

2)Unplugging the ac adaptor is fine as a safety measure, (possible fire or night-time lightning strikes to the power cables) but is not otherwise necessary . If you don’t have a battery fitted, then auto wake-up (eg for incoming fax) won’t of course be available

3. Yes – there is small power consumption on hibernate, from the battery if ac power is unavailable. It’s still connected to the power arbitration circuitry. But the small recharge does not to my knowledge count towards the lifetime cycle count.

4. Personally, I think the fact that the hp 6710B battery is held in a full state of charge and kept warm will have a greater effect on its life.

5. A properly working battery will measure input and output watts, keeping track or and reporting its charge state. With many short and shallow discharge cycles, its knowledge of its charge state will drift from reality but will otherwise not do any harm. A discharge to 5% or less while working normally follwed by a full recharge should recalibrate the hp compaq nx6325 battery . There is no need to discharge to the switch-off and can’t restart stage, although the deeper the discharge, the more accurate should be the calibration.

Having said all of that, it only takes one cell to fail – or a problem in the battery’s internal control system – for the battery to fail completely – and one of these events is more probable than an end of life on cycle count. Consequently, in your position of needing battery power a couple of times a week, I wouldn’t bother taking it out at all – unless your machine keeps it unduly warm.