LSD NiMH shelf life?

[jzmtl]

Anyone have an idea of what's the shelf life of LSD variety of NMH is like? Not the stored energy lose, but rather the maximum capacity degradation during storage.

I'm wondering if I should get some extra eneloop/duraloop while they are on sale, you know, just in case. But if they lose max capacity while in storage it wouldn't be worth it then.

 

[Niconical]

I don't remember reading anything about capacity loss (as opposed to just self discharge) over time for LSD, and although I'm no expert I do try to keep up with all things LSD. Eneloops have been tested up to 2 years and even more out of the pack and they were fine after a few cycles or a Maha break-in, so I'd tentatively say no (or minimal) capacity loss, and nothing that a charge/discharge/charge cycle couldnt cure on a good quality cell like the eneloop.

 

[Mr Happy]

I've found that brand new Eneloops have a capacity of about 2000 mAh while 2006 stock have a capacity of about 1850 mAh. But maybe the 2006 cells have suffered from gathering dust and would perform better now if they had been cycled and refreshed regularly.

 

[jzmtl]

Thanks. So even if that's permanent loss, it's about 5% per year, not too bad I suppose.

 

[pipsqueakspace]

Anyone have an idea of what's the shelf life of LSD variety of NMH is like? Not the stored energy lose, but rather the maximum capacity degradation during storage.

I'm wondering if I should get some extra eneloop/duraloop while they are on sale, you know, just in case. But if they lose max capacity while in storage it wouldn't be worth it then.

if you dont mind me asking.... where is the sale on these

i could always use some eneloops...

 

[jzmtl]

if you dont mind me asking.... where is the sale on these

i could always use some eneloops...

It was on Dell.ca, they come on sale once in a while but the last one is over a couple of days ago.

 

[Bones]

Thanks. So even if that's permanent loss, it's about 5% per year, not too bad I suppose.

It might be prudent to expand the data-base before we draw any conclusions as to permanent capacity loss.

For example, one of my 2006 vintage Eneloops recently broke 2000mAh on a break-in charge, which had never happened before, and I remember thinking at the time they were actually gaining rather than losing capacity as they aged.

As well, not all that long ago, Sanyo started claiming that the Eneloop would still hold 80% of its charge after three years. If you factored a 5% per year capacity loss into that equation, the actual self-discharge would have to be virtually nil in order for their claim to stand.

 

[csa]

This is an interesting topic. I hope someone can gather a bit more data, 2 anecdotal evidence points is a good start though. I'll throw in a third, which is that I recently discovered a very old unused cell (not LSD and probably 2004 vintage) which charged to about the same capacity as the rest of its batch did when new.

 

[jzmtl]

It might be prudent to expand the data-base before we draw any conclusions as to permanent capacity loss.

That would be ideal, but given the topic and relative newness of LSD cells data is going to be hard to come by.

 

[Marc999]

It might be prudent to expand the data-base before we draw any conclusions as to permanent capacity loss.

For example, one of my 2006 vintage Eneloops recently broke 2000mAh on a break-in charge, which had never happened before, and I remember thinking at the time they were actually gaining rather than losing capacity as they aged.

I realize this is an old thread but thought I'd ask you Bones. I have 4+ yr. old eneloops and they are ~ 1840 mAh. They used to be low to mid 1900's when new, on the mh-c9000. I was wondering if the cells you spoke of in this thread were frequently used or not?

Marc