How much battery cycles to lose 10 % of capacity ?

My samsung battery already lost 13 % of it's capacity or wear level of 13 % .

My battery is only 3 months old, is this possible, how much cycles must the battery have gone through for this loss ?

 

NOBODY can say. That sounds abnormal though.

 

Get a replacement you should not loose more than 10% in a year.

 

Also try all the tricks for regaining battery life and see if anything works. It could also be software reporting that incorrectly. Have you timed how long the batter lasts?

 

I reinstalled Vista, before that , I haven't checked the wear level, now I use RMclock.

What tricks ?

Let the battery run almost empty ?

Timing when the laptop is running idle ?
( I have never timed it)

 

1yr. 4 months, 4% wear.


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When I did tech support for an OEM company, they said it was 400 full charges for the life of a battery in the models we were supporting at the time. Batteries have probably gotten better since then, but with that number..... it would be 40 battery cycles.

 

Most batteries are rated for 300-400 cycles before they drop to 85% of capacity. After that, charge will probably start dropping rapidly.

 

Calibrating the battery can sometimes reduce the reported wear level, as if the battery is misreporting its charge level, the reported battery wear level will also be off.

 

hmm.. now I started to worry, I've got 9% in a 5 month usage.
Should I get the replacement?

I do practice un-healthy charging habit FWIW, (i.e charging when battery is @60%, IIRC that will just reduce my charge cycle, but does charge cycle correlate with wear level? Most of the time I plug my lappie on socket, though. So 9% is just..

EDIT: just removed my battery for 15 min or so, plug it on again the wear level reseted to 0%. Geez was Rmclock lying or what?

 

Lithium Ion/Polymer batteries (as are used in almost all modern laptops) do not care about how you recharge them.

For example:
100% to 50% usage, then you recharge to 100%. This is one half of a cycle as quoted by the manufacturer.

There is no "battery memory". However, discharging until the laptop hibernates, then recharging fully (without unplugging the laptop at all) can calibrate the battery's onboard circuitry and give you a more accurate reading on health and charge state.

The biggest killer of lithium batteries is heat, and this is often dependant on the particular laptop's design and how much ventilation it gets.

 

a lot... i would say at least 300... i lost 10-20% of my capacity...