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Battery drop suddenly...

X230 and later series specific matters only
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goji
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Location: Aix, France

Battery drop suddenly...

#1 Post by goji » Thu Aug 27, 2015 8:19 pm

Hello, i noticed my main battery is dropping, i don't know from what to what but it's at least 35% sudden drop, maybe much more. Is it defective for good or i can try things to fix it?

brchan
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Re: Battery drop suddenly...

#2 Post by brchan » Thu Aug 27, 2015 8:26 pm

Probably a bad cell in the battery. Getting a working new or used battery will fix the issue. Don't bother trying to open up the battery, as there is a 95% chance or bricking it.
Current Thinkpads: W530 (functional classic keyboard mod), X301, T61, T60, T43, A31p, T23, 600X, 770
Other: mk5 Toughbook cf-19, mk1 Toughbook cf-53

goji
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Location: Aix, France

Re: Battery drop suddenly...

#3 Post by goji » Thu Aug 27, 2015 9:59 pm

It's not dangerous to use it still, right?

precip9
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Re: Battery drop suddenly...

#4 Post by precip9 » Thu Aug 27, 2015 11:04 pm

Before you trash, try recalibrate in PM menu.
W500x3 with T9900, , T400 highnit 1280x800 with P9600, X61sx3, X61Tx3.

goji
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Re: Battery drop suddenly...

#5 Post by goji » Thu Aug 27, 2015 11:28 pm

I saw that option. I have to let the unit work during hour (without interfering) to recalibrate, right?

EDIT: well it seems same things happened with another brand new.. so it may not be the batteries..!?

precip9
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Re: Battery drop suddenly...

#6 Post by precip9 » Fri Aug 28, 2015 2:08 am

Recalibrate both.

Yes, you have to leave the machine undisturbed while recalibrating.
W500x3 with T9900, , T400 highnit 1280x800 with P9600, X61sx3, X61Tx3.

goji
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#7 Post by goji » Fri Aug 28, 2015 12:54 pm

Ok I'll try that now. Just tell me, what could cause such issue?

Always quote my messages so I get notified quickly!

precip9
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Re:

#8 Post by precip9 » Fri Aug 28, 2015 1:42 pm

goji wrote:Ok I'll try that now. Just tell me, what could cause such issue?

Always quote my messages so I get notified quickly!
A laptop computer determines the state of charge by the voltage curve. As the battery discharges, the voltages drops. But the voltage curve changes over time. As a battery ages, the internal resistance increases. This causes the battery voltage to sag more quickly, even if the same amount of charge is available.

There is an electronic measuring device that would avoid this. It is called a couloumb meter. It actually measures the quantity of electrons passing through. With a coulomb meter, there would be much less error. But, it adds expense.

Many users report that their years-old batteries have not aged, and retain all the original capacity. They are deceived by the way capacity is measured. It is only determined during recalibration. In between calibrations, the displayed value of battery capacity is "what it was" when last calibrated, not what it is now.
W500x3 with T9900, , T400 highnit 1280x800 with P9600, X61sx3, X61Tx3.

goji
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Joined: Tue May 13, 2014 11:19 am
Location: Aix, France

Re: Battery drop suddenly...

#9 Post by goji » Fri Aug 28, 2015 4:11 pm

Seems strange that brand new one'd doing this too. I'm thinking there may be an issue with the hardware somewhere else..?

precip9
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Re: Battery drop suddenly...

#10 Post by precip9 » Fri Aug 28, 2015 4:54 pm

Not strange. Makers advise recalibrate new battery.
W500x3 with T9900, , T400 highnit 1280x800 with P9600, X61sx3, X61Tx3.

goji
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Joined: Tue May 13, 2014 11:19 am
Location: Aix, France

Re: Battery drop suddenly...

#11 Post by goji » Fri Aug 28, 2015 10:41 pm

Ok but as said it does it with both old & new battery, that happening at the same time is very strange!

Anyways, calibration of new battery is done, now i'm waiting it to discharge. I'm @85% & get a ~3h runtime.

Strange again compared to the review (notebookcheck) which report a ~5h battery life during regular surf (what i do now)..

goji
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Joined: Tue May 13, 2014 11:19 am
Location: Aix, France

#12 Post by goji » Sat Aug 29, 2015 5:29 am

The oldest battery.. I start test, it loads it until 99% then it days 1min remain before full list m load. That goes in for way too long, don't you think,

Always quote my messages so I get notified quickly!

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