GarageBoy
Flashlight Enthusiast
I know the cathodes go bad over the years, but has anyone actually experienced it?
Li Ions dying of age?
- Thread starter GarageBoy
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Black Rose
Flashlight Enthusiast
Not with the cylindrical cells I use in flashlights, but the LI-10B cell for my Olympus digital camera is failing after 6 or so years of usage/life.
VidPro
Flashlight Enthusiast
yes, in the hundreds. both li-ion round cell, rectangle li-ion, li-poly bagged, camera batts, PDA cells, and this big huge bank of test cells, and various laptop cells removed for testing.
then ultrafire cells , and other cheap china cells that die at least 2x as fast.
as far as ONLY stored, storing them properly does seem to be very effective, but all of it is very hard to tell, each different cell item/brand/size can act so wildly different, and many protection types will require more maintance to keep them at some same voltage.
from what i can tell every methodology that has been presented holds to be true, keep it charge high constant, not so good, let it stay discharged to low, not good, cheap cruddy cells , not so good. storage at ~50% good. As far as Number of cycles, never been an issue because of the other time factor, 365 partial cycles is still a whole year .
it is also VERY hard to know the exact real age of a cell when getting it (as consumer) to begin with. but generally Battery packs in crappy aged old yellowed packaging will certannly die faster than Batteries that looked like they had not been on the shelf for ages.
But , remember those bats that didnt sell well, also might be bats that didnt work well so people avoided them.
the only thing i have found to NOT be true about how to treat them and what is said, is there ARE cell types out there that easily last 5 years, and there are cell types out there that are complete schmuck , and (depending on how much time they spent on the shelf) arent worth the metal used to make them.
i have seen about 175 cells total of various type be finished due to age, with various quantities of cycles, various types of storage and maintance, none of them have lived forever so far. the Saft Ds though are trying for a world record
and them rectangular metal cells they are putting in Pda and phones could be good to (minus the fact that the devices heat them badly)
then ultrafire cells , and other cheap china cells that die at least 2x as fast.
as far as ONLY stored, storing them properly does seem to be very effective, but all of it is very hard to tell, each different cell item/brand/size can act so wildly different, and many protection types will require more maintance to keep them at some same voltage.
from what i can tell every methodology that has been presented holds to be true, keep it charge high constant, not so good, let it stay discharged to low, not good, cheap cruddy cells , not so good. storage at ~50% good. As far as Number of cycles, never been an issue because of the other time factor, 365 partial cycles is still a whole year .
it is also VERY hard to know the exact real age of a cell when getting it (as consumer) to begin with. but generally Battery packs in crappy aged old yellowed packaging will certannly die faster than Batteries that looked like they had not been on the shelf for ages.
But , remember those bats that didnt sell well, also might be bats that didnt work well so people avoided them.
the only thing i have found to NOT be true about how to treat them and what is said, is there ARE cell types out there that easily last 5 years, and there are cell types out there that are complete schmuck , and (depending on how much time they spent on the shelf) arent worth the metal used to make them.
i have seen about 175 cells total of various type be finished due to age, with various quantities of cycles, various types of storage and maintance, none of them have lived forever so far. the Saft Ds though are trying for a world record
and them rectangular metal cells they are putting in Pda and phones could be good to (minus the fact that the devices heat them badly)
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