IMR or INR batteries?

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rogue2020
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IMR or INR batteries?

Hi everyone,

I would like to know are there any differences between High Drain IMR vs INR Batteries? Which is better in terms of performance and durability? Is IMR easier to refresh if over-discharged?

Also, what are your best practices for long term (3 – 6 months) storage of IMR and INR batteries?

Thanks everyone & have a nice weekend!

Best Regard… rogue2020

texas shooter
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3-6 months is short term storage for these cells. I typically store them at 3.8-4.0 volts. They will store for years. INR is a newer chemistry having Nickel in it.

Barkuti
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IMR is (mostly?) a lie nowadays, a marketing lie. with one of the latest true IMR cells which came to market being the LG HB6. Check the following article: Battery chemistry FINALLY explained @ Battery Bro.

Edited. Not even the HB6 is IMR, according to this old article by Mooch: LG HB6 30A 1500mAh 18650 Bench Test Results...better than SX30 at >25A

What this means is all those considerations of yours (even mine?) are mostly nonsense, namely because manufacturers do not expressly disclose the chemistry of their cells. Even I was senselessly presuming the HB6 was IMR. I now wonder if there still exists a single IMR (LiMn2O4) cell available in the market (?). How can we be telling the truth if we are just passing on other's lies… Facepalm

Any over-discharged battery should be taken with care. I personally have recovered (Samsung 26C) cells which slept close or under 2V, but that was after I recharged and discharged them a good deal of times (capacity and overall testing), and after this I set all the cells slightly under 3.9V (charged all cells in parallel), and observed their self-discharge over a period of a few weeks. I proceeded to discard all cells with noticeable loss of voltage (higher than a few mV). I discarded 2 out of 6 cells.

Thu, 07/30/2020 - 17:39

The Light Innocent I am

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

thefreeman
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Barkuti wrote:

IMR is mostly a lie nowadays, a marketing lie, with one of the latest true IMR cells which came to market being the LG HB6. Check the following article: Battery chemistry FINALLY explained @ Battery Bro.


What this means is all those considerations of yours are mostly nonsense, namely because manufacturers do not expressly disclose the chemistry of their cells.

Some examples to add to this:


Design Strategies for High Power vs. High EnergyLithium Ion Cells


https://www.nasa.gov/sites/default/files/atoms/files/3-nasa_battery_work...

The batterybro article says that HB2 is LMO/IMR, but is actually NMC/INR.

Some rewrappers still call their cell IMR, but it’s just a marketing thing at this point, Samsung uses INR (NMC) prefix but all the ones analysed are NCA, except 25R which is a blend.