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How to store 'new' batteries?

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Harry in Warsaw
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How to store 'new' batteries?

#1 Post by Harry in Warsaw » Sun Jun 09, 2019 6:46 am

I recently got lucky and found three 44++ (9-cell) batteries for my X230 (and possibly for a future X330p). They're were all still sealed in the original Lenovo boxes with Lenovo security tape intact. I opened one and it seems in every way to be genuine. So now I'm wondering how best to store the other two. Should I leave them sealed in their boxes (maintaining value) or open them and give them charge once every so often? If to open them, how often to charge them and to what percentage of capacity?

All advice would be much appreciated.

axur-delmeria
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Re: How to store 'new' batteries?

#2 Post by axur-delmeria » Sun Jun 09, 2019 11:25 am

I'd rather put them on rotation than keep them in storage and hope they keep their capacity.
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Re: How to store 'new' batteries?

#3 Post by Thinkpad4by3 » Sun Jun 09, 2019 11:58 am

axur-delmeria wrote:
Sun Jun 09, 2019 11:25 am
I'd rather put them on rotation than keep them in storage and hope they keep their capacity.
Well for "storage" I'd open them, top up to 6
~60% and monitor them down to maybe 30% and charge back up to 60.
Thinkpad4by3's Law of the Universe.

The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.

theterminator93
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Re: How to store 'new' batteries?

#4 Post by theterminator93 » Sun Jun 09, 2019 8:24 pm

Keep them cool, above all else. 70F/20C or so is fair - don't let them freeze, and I'd think putting them in a refrigerator is a little extreme... although a cool basement or cellar (50-60F/10-15C) would be most practically ideal. If the voltage in the cells drops too low they can't be safely recharged but I've never encountered that with a NOS Li-ion cell (oldest ones I've recharged from 0% were probably 7 or 8 years old). But storing them at 20-40% is more desirable to avoid the potential for an under-voltage condition killing one cell, and thereby the entire battery.
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artic_squirrel
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Re: How to store 'new' batteries?

#5 Post by artic_squirrel » Tue Jun 11, 2019 3:07 am

i have the same question for the L390. I only use the laptop on my desk, so I removed the internal battery as soon as I opened the lenovo box. The battery was charges at 70% and now it is around 55% after I updated the bios and discovered the laptop. I leave the battery under my bed where the air is cold.

Should I use the battery a few times, charging it around 80% and discharging it around 30 %, like 5 times, then leave it in the box ?

dr_st
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Re: How to store 'new' batteries?

#6 Post by dr_st » Tue Jun 11, 2019 6:30 am

theterminator93 wrote:
Sun Jun 09, 2019 8:24 pm
But storing them at 20-40% is more desirable to avoid the potential for an under-voltage condition killing one cell, and thereby the entire battery.
I'd even go as far as suggesting to charge them to 80-90% before storage. The degradation is theoretically still much lower than when at 100% (and heated), but it will take longer for them to discharge down to 0%.
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Re: How to store 'new' batteries?

#7 Post by ajkula66 » Tue Jun 11, 2019 9:18 am

artic_squirrel wrote:
Tue Jun 11, 2019 3:07 am

Should I use the battery a few times, charging it around 80% and discharging it around 30 %, like 5 times, then leave it in the box ?
You should leave it in the laptop. Most ThinkPads are not designed for optimal performance unless a battery is installed.
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dr_st
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Re: How to store 'new' batteries?

#8 Post by dr_st » Tue Jun 11, 2019 9:26 am

We're talking about extra batteries. :wink:
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Re: How to store 'new' batteries?

#9 Post by Thinkpad4by3 » Tue Jun 11, 2019 9:39 am

ajkula66 wrote:
Tue Jun 11, 2019 9:18 am
You should leave it in the laptop. Most ThinkPads are not designed for optimal performance unless a battery is installed.
I think this is mostly a relic of the past given a 45W adapter has more than enough wattage to power a ULV CPU powered TP that most are nowadays.
Thinkpad4by3's Law of the Universe.

The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.

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Re: How to store 'new' batteries?

#10 Post by dr_st » Tue Jun 11, 2019 10:02 am

Well, a 65W PSU had enough juice in the past, but still. And recall that we are discussing an X230 here, not a modern ULV offering.

In any case, although I have no concrete evidence that modern Thinkpads throttle anything without a battery installed, running any laptop without a battery is just dumb, in my book.

But again, we are talking about extra batteries here. :D
Thinkpad 25 (20K7), X1 Carbon (20HQ), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
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artic_squirrel
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Re: How to store 'new' batteries?

#11 Post by artic_squirrel » Fri Jun 14, 2019 10:36 am

the people at notebookcheck says that the L390 show no difference in terms of power with respect to power plugged in or not. But I think the X390 has no full power when only on battery.

Thinkpad4by3
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Re: How to store 'new' batteries?

#12 Post by Thinkpad4by3 » Fri Jun 14, 2019 11:28 am

dr_st wrote:
Tue Jun 11, 2019 10:02 am
Well, a 65W PSU had enough juice in the past, but still. And recall that we are discussing an X230 here, not a modern ULV offering.

In any case, although I have no concrete evidence that modern Thinkpads throttle anything without a battery installed, running any laptop without a battery is just dumb, in my book.

But again, we are talking about extra batteries here. :D
AFAIK its basically the A31p that throttles, possibly the W700 since both can easily draw as much as their adapter can supply, well at least with using the smaller 170W with the W700 or ds variant.
Thinkpad4by3's Law of the Universe.

The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.

dr_st
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Re: How to store 'new' batteries?

#13 Post by dr_st » Fri Jun 14, 2019 12:12 pm

Thinkpad4by3 wrote:
Fri Jun 14, 2019 11:28 am
AFAIK its basically the A31p that throttles, possibly the W700 since both can easily draw as much as their adapter can supply, well at least with using the smaller 170W with the W700 or ds variant.
AFAIK, all Lenovo Thinkpads that use the 20V round plug throttle down if a 65W PSU is used without a battery. Dunno when (or if) it changed with the new rectangular tip adapter generation.
Thinkpad 25 (20K7), X1 Carbon (20HQ), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

ajkula66
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Re: How to store 'new' batteries?

#14 Post by ajkula66 » Fri Jun 14, 2019 1:01 pm

artic_squirrel wrote:
Fri Jun 14, 2019 10:36 am
the people at notebookcheck says that the L390 show no difference in terms of power with respect to power plugged in or not. But I think the X390 has no full power when only on battery.
I've never dealt with the machine in question - or any laptop from that generation - but in many cases the power settings are incredibly important.
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

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Abused daily: X200s


PMs requesting personal tech support will be ignored.

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