Battery Self Discharge Rate

[Kemosabe]

Does anyone know approximately how long it would take for a pair Trustfire 14500 3.7v 900mAh batts to self discharge?

I usually keep one pair in my mod, and another pair fully charged as backup. This week, the pair in my mod lasted me the entire week, so the fully charged ones just sat there, self discharging. I did not expect them to be almost dead when i popped them in. I only got about an hour of vaping out of them but they were fully charged last week. Is this normal?

I'm trying to source the problem. I doubt its the mod, but you never know. This did happen once before and I chalked it up to a faulty charge. The way my charger is, the springs sometimes come in contact with the plastic wrapper on the negative side. I had thought i got a bum charge due to the plasic getting in the way.

I have no idea whats going on. Please help.

Thanks /

 

[Rocketman]

What did your voltmeter say?

 

[Kemosabe]

i dont have one

maybe radio shack or somewhere would have one i can get real quick...any suggestions?

 

[carlton]

Do you have a Harbor Freight nearby? You can pick up a multimeter for around $5.

 

[iowajosh]

I think it takes months and months for lithium bats to run low. You should not be using those bats without a multimeter. And trustfire isn't high quality, either. There will be some failure rate.

 

[SnowDragon]

+1 Iowajosh.... The biggest factor on discharge rates is the ambient temperature they are being stored at. At room temperature is would take a very very long time. This info is available at BatteryUniversity.com

 

[Kemosabe]

Do you have a Harbor Freight nearby? You can pick up a multimeter for around $5.

yes, i do. thanks!

I think it takes months and months for lithium bats to run low. You should not be using those bats without a multimeter. And trustfire isn't high quality, either. There will be some failure rate.

i figured as much. i knew they shouldnt have been dead. it must have been a bum charge. it seems to happen every once in a while. im not sure if the plastic coating is getting in the way of the metal spring in the charger or if the batts are just inferior. it is strange how they will be fine for weeks, then all of a sudden theyll be dead when they shouldnt be.

i had no idea that Trustfire was not good quality. which brand would be some good quality 14500 batts? the only reason i got the Trustfires was because i was told those were to ones that best fit by box. but i figure that all 14500 batts are the same size. 50 mm or something like that.

 

[Kemosabe]

good call on battery university. i havent checked them out in a long time.

the temperature was room temp for the most part. but we did have sort of a heat wave here so maybe that stressed the batts.

+1 Iowajosh.... The biggest factor on discharge rates is the ambient temperature they are being stored at. At room temperature is would take a very very long time. This info is available at BatteryUniversity.com