Spontaneous discharge status of 14500 etc batteries

[LiteTheWay]

I am interested to know if the gurus here can tell me anything about the spontaneous discharge over time of the rechargeable 3.6/3.7 volt 10440, 14500 etc type batteries and the rechargeable 3.0v CR2 type batteries.

That is: are these more in the spontaneous discharge category of 'standard' NiMH rechargeables or more like the 'new' LSD Eneloops and Imedions etc?

Great forum - especially the great guru silverfox.

 

[moldyoldy]

I am interested to know if the gurus here can tell me anything about the spontaneous discharge over time of the rechargeable 3.6/3.7 volt 10440, 14500 etc type batteries and the rechargeable 3.0v CR2 type batteries.

That is: are these more in the spontaneous discharge category of 'standard' NiMH rechargeables or more like the 'new' LSD Eneloops and Imedions etc?

Great forum - especially the great guru silverfox.

First of all, Silverfox has a wealth of hard-earned knowledge and shares it willingly with us mortals! Thank you SilverFox!

Regarding the self-discharge rate of rechargeable Lithium Ion cells: Based on my direct experience with a couple dozen RCR123 and AAA/AA Li-Ion cells, the self-discharge rate is negligible. THis includes usage involving doorbell batteries and spare flashlights in 4 cars. I suspect the lost capacity from self discharge in RCR123 cells is lower than AA Eneloops or Imedions, and I have a dozen Imedions in use as well.

However, that should not indicate that I have not had what I consider failures in the RCR123 cells. I have had maybe a dozen failures in the last year among a lot of usage by about a half-dozen family and friends. The usual symptom of a failed RCR123 cell is to not accept a charge. The charger will indicate a "charged" cell when in fact the cell will no longer power a flashlight at any output level. That can happen after a dozen charges, or maybe even 40-50 charges. I have found distinct differences in longevity between brands, but since I have not recorded any data, I will not comment further on brand differences. Do a search for RCR123 testing and let that data guide you.

 

[shadowjk]

Were those failed cells discharged too much?

 

[VidPro]

I am interested to know if the gurus here can tell me anything about the spontaneous discharge over time of the rechargeable 3.6/3.7 volt 10440, 14500 etc type batteries and the rechargeable 3.0v CR2 type batteries.

That is: are these more in the spontaneous discharge category of 'standard' NiMH rechargeables or more like the 'new' LSD Eneloops and Imedions etc?

Great forum - especially the great guru silverfox.

i have 4 10440's and they are cheap ones too, they dont self discharge much at all, better than a LSD.
most of my 14500's dont have much self discharge either, but some i have on protection curcuits, and they seem to self discharge faster, but i still get 6 Months without worring about it.

then reverse all that 100% because the 10440s arent protected, and some of my 14500s arent protected, and IF you let them get to low in voltage, then they WILL completly self discharge, become useless , self discharge continually, and be even dangerous to charge.

so the self discharge is lower than ni-mhys for sure, and lower than LSD when: 1) you use it within spec 2) it was a good cell and treated well before you got it, and treated well after you get it. 3) depending on any draw from a cheap protection curcuit.

generally li-ion is a wonderfull battery for capacity, and self discharge, even in the smaller or larger sizes, way better than ni-???. but it must be treated with more special care than the ni-??? things for sure.