Best way to long-term store li-ion battery`s

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TinderBox (UK)

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Just bought a spare battery for my JVC camcorder that i will only use now and then, and need it to last as long as possible.

It might only be used once or twice a year if that.

How can i slowdown the natural deterioration of the li-ion cells, if possible.

Thankyou.
 

TinderBox (UK)

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Does the protection circuit , and this one has a info function for battery run-time, drain the battery faster.

I suppose it`s like a notebook battery.

Does storing it at 40% run the risk of battery going flat if left for months at a time.

Thanks.
 

Anders

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Hello Tinderbox.

Yes, the protection circuit would drain it faster.

I think a couple of months would be fine but after that, maybe its time to charge it some. It probably would have three contacts, one plus one minus and one temp, one measurement of these contacts would tell you the status of the battery.

Its better to have it fuller than emptier.
Dont forget to let it warm up to room temperature in the zip lock bag before charging.

Anders
 

VidPro

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How can i slowdown the natural deterioration of the li-ion cells, if possible.

Thankyou.

buy good cells :shrug: .
after use charge it to 60% about, then check it every 5 months (because of the protection). if you KNOW or learn the drain on the protection, then adjust accordingly.
if you use refridgeration, make SURE you bring it up to room temperature while still enclosed in moisture barrier thing, or you will get condensation on it. which means its not really immediatly ready to use if stored cold, because you need about 1 hr to get it back to room temps to avoid condarnsation. Moisture on these small electronic parts of these tiny controller stuff seems to be causing quite a few issues, so even if it wont cause much problems for the battery, you still have all that electronics junk in there getting moisture on it.

after such long term storage, it might be good to use it up on the camera, till cut-off then imediatly charge it to full, then you will get the most out of it during use. and you will recalibrate any "info" junk that doesnt work anyways :). cool thing about cameras they oft have pretty good charge indicators, so you can have a good idea of the level before storage.
 
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Rat

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Best way to store Li-ion Batteries

Hi I just purchased two pairs of LiMnNiCo 26650 4000mAh Lithium batteries but only really need one pair for now.
So my question is the pair I will not be using will it be better to charge them before putting them in storage or is it better to just store them as they come not charged ?


thx for any help
cheers
 

badtziscool

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Re: Best way to store Li-ion Batteries

It's best to store li-ion batteries at around half charge. That's about 3.8v, I think.
 

Rat

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Re: Best way to store Li-ion Batteries

Thanks guys
 

pavithra_uk

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How to store Li-ion cells

I have around 25 pcs of 18650 Li-ion batteries that salvaged from laptop battery packs. & few li-ion polymer packs.
what is the best way to store these cells for long term.
at what charge level ?

Is it good idea to pack cells water / air proof and keep in freezer ? or Refrigerator compartment ?

or room temperature ??
 
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127.0.0.1

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Re: 18650 Li-ion Keep in freezer ??

I have around 25 pcs of 18650 Li-ion batteries that salvaged from laptop battery packs. & few li-ion polymer packs.
what is the best way to store these cells for long term.
at what charge level ?

Is it good idea to pack cells water / air proof and keep in freezer ? or Refrigerator compartment ?

or room temperature ??

I would say store at 3.2 volts room temp
charge when ready to put into circulation

someone may have other ideas... mine won't
kill the cells prematurely [but might not be exactly
the perfect ideal scientific and measured best.]
 

ScaryFatKidGT

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Re: 18650 Li-ion Keep in freezer ??

Keeping them in a cool fridge would be good but not a frezzer a cool basment closet would work just don't keep them my a stove, oven, heat vent ect.
 

Lite_me

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Re: 18650 Li-ion Keep in freezer ??

The best advice you'll receive is to charge (or discharge) them to ~3.8v and store them in the refrigerator in a Ziploc bag. This puts them in the most stable state and environment for future use.
 

alex987

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how to store mnke imr 26650 and inr 26650 charged/discharged ?

hello every one does anybody know if the mnke imr 26650 and the inr 26650 kingkong need to be stored charged or discharged?

Your thread has been Merged - Norm
 
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alex987

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best way to store imr/inr cells

hello what is the best way to store imr and inr cells charged or discharged ?
thanks
 

45/70

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Re: best way to store imr/inr cells

Hi Alex. The best way to store any chemistry of Li-Ion cell, is partially charged and in a cool area. I store my cells that are not in service at about 35-40F in my refrigerator, with about a 40% charge (3.75-3.85 OC Volts, for LiCo/ICR and LiMn/IMR cells). This can extend cell longevity (from Battery University) by three or more times, as opposed to storing cells fully charged, at room temperature. I'll add that I have LiCo cells that are about 7 years old, that still perform adequately. They still have 80%+ of their original capacity and maintain voltage under load, reasonably well.

Dave
 
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alex987

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Re: best way to store imr/inr cells

ok norm thanks i could not find my first thread but found it
greetings alex
 
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