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Author Topic: Guidelines for prolonging Li-ion battery life  (Read 5529 times)

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Offline Gutbucket

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Guidelines for prolonging Li-ion battery life
« on: March 19, 2009, 07:59:56 PM »
Wikipedia info on Li-ion that I was unaware of and should be helpful-

Guidelines for prolonging Li-ion battery life
    * Like many rechargeable batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%
    * Lithium-ion batteries should not be frequently fully discharged and recharged ("deep-cycled"), but this may be necessary after about every 30th recharge to recalibrate any electronic charge monitor (e.g. a battery meter). This allows the monitoring electronics to more accurately estimate battery charge.[25]
    * Li-ion batteries should never be depleted to below their minimum voltage, 2.4 V to 3.0 V per cell.
    * Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.
    * Li-ion batteries should not be frozen [43] (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).
    * Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[25]
    * When using a notebook computer running from fixed line power over extended periods, consider removing the battery[44] and storing it in a cool place so that it is not affected by the heat produced by the computer.




Here's another link with great battery information for all types: BatteryUniversity.com  Part Two - Getting the most from your batteries

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Offline dactylus

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Re: Guidelines for prolonging Li-ion battery life
« Reply #1 on: March 20, 2009, 10:29:30 AM »


Very interesting.  Thanks for the information!

 :)
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Offline Gutbucket

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Re: Guidelines for prolonging Li-ion battery life
« Reply #2 on: March 20, 2009, 10:45:15 AM »
Looks like I need to make some room in my freezer.

If anyone stores their DVD batteries this way I'd suggest putting them in a ziplock bag so condensation forms outside the bag as they warm up for top-up charging and use.  A desiccant pack thrown in there wouldn't hurt either.
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stevetoney

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Re: Guidelines for prolonging Li-ion battery life
« Reply #3 on: March 20, 2009, 10:00:06 PM »
Wish some of those guidelines came with an explanation 'why'  to go with the guideline so that I could assess for myself whether or not wikipedia is full of poop or not.

Also, I'm not sure I understand the first one.  Are they suggesting that if it's been awhile since the battery has been used, just charge it half way, then discharge it, then go ahead and charge it fully?


Offline Gutbucket

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Re: Guidelines for prolonging Li-ion battery life
« Reply #4 on: March 21, 2009, 12:33:27 AM »
The second link above, battery university, is more in depth and perhaps credible. There are a number of articles on aspects of electrical batteries of all sorts. "Author
Isidor Buchmann is the founder and CEO of Cadex Electronics Inc., in Vancouver BC."


The How to prolong lithium-based batteries page from that site explains how storage at 1/2 charge prevents loss of storage capacity.
musical volition > vibrations > voltages > numeric values > voltages > vibrations> virtual teleportation time-machine experience
Better recording made easy - >>Improved PAS table<< | Made excellent- >>click here to download the Oddball Microphone Technique illustrated PDF booklet<< (note: This is a 1st draft, now several years old and in need of revision!  Stay tuned)

Offline Red Boink

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Re: Guidelines for prolonging Li-ion battery life
« Reply #5 on: April 02, 2009, 06:29:24 PM »
I've been using batteries from this company for years without any problem.  Here's a link to general battery info:

http://www.idxtek.com/support/tech_info.html

Best,


John

Offline RobertNC

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Re: Guidelines for prolonging Li-ion battery life
« Reply #6 on: April 24, 2009, 10:04:12 PM »
I don't know if it is related to the battery meter and calibration or not, but I have seen this a few times now.

If you have a battery that has not been used recently (I busted out everything I had for XMas Jam this year) and it does not seem to take a full charge, run the device until it powers down, then  recharge the battery again.  If it takes the full charge after that, you should be good.

Even an old Sony battery that came with my 722 and had not been used for a couple of years, did not take a full charge on the first cycle, ran like a champ after running it down and recharging.
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