Battery Wear Level

Battery Wear Level

(Latitude E6420)

I use the battery about 2-3 times a week.I have my laptop for 6 weeks now.Every time I use the battery under levels of 20% of charge the wear level drops.I havent discharged it under 20% for 3 weeks now and it is stable.

I know that when you discharge the battery so much it calibrates it's wear level.Do I really damage my battery when I discharge it so much?Now that I am avoiding discharge levels under 20% does the battery only seem to have stabilized it's wear level and once it recalibrates it will show the acctual wear level?

I am at 14% of wear level already

 

When you fully discharge a battery, it recalibrates the battery meter, not the wear level. That being said, lithium-ion batteries shouldn't be discharged that much that frequently, so I would avoid doing it for this reason alone. If you are using the battery so much, I would consider getting a 9-cell if you are using the 6-cell.

The 2-year-old battery I'm using in my E6410 has 11% wear and a full charge shows 111%, so I'm not sure what wear level actually means. Battery life does seem shorter than before though (it was originally from an E6400).

 

Battery meter and wear level are connected.Remaining energy at 100% is Nominal Capacity-wear level*Nominal capacity.

Anyway you are right I should have a 9-cell battery.I will buy one later after this one dies.

I have had many laptops before where the battery died after 2 years whitout even using it.I think it was because the battery was at 100% of charge all the time and because of the laptop heat going to the battery.