about how many charge cycles do you guys think batterys should last for before they are replaced? Time estimate?
How Many Charges?
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How long do you think it takes you to reach said 300 cycles....Man come to think of it i should toss some of my old batteries
300-3000 charges, depending on quality of battery, quality of owner, and whether an owner wants to extend lifespan of a battery. (ballpark estimate, but not too big ballpark).
I do not really follow advises on extending battery life. I'd rather be lazy and buy another set of batteries after (I hope) 500 cycles.
the manufacturers of these batteries claim a life expectancy of 300 cycles but the actual life expectancy depends a lot on how you use them. high discharge rates and deep discharge will shorten the life but low discharge rates and only discharging them 50% will increase the life of the batteries. a good charger will allow you to monitor the capacity of your batteries and determine when they are no longer useful for your application. storage capacity goes down and internal resistance goes up as a battery ages. if you are a cloud chaser then you should also monitor battery temperature.since the increase in internal resistance with age will also cause and increase in operating temperature and decrease in the maximum safe discharge current.on the other hand a "tootle puffer" may safely get a lot more than 300 cycles out of a good battery. many of the cheap batteries on e-bay are used batteries that are re wrapped and are well beyond their normal life expectancy witch shows up when they are charged. one battery I tested was rated at 3000mah but when discharged to 2.5 volts. would only hold 800 mah on a full recharge. ( don't try this unless you have the proper equipment and training)
Well, assuming you charge your batteries once a day, it's pretty easy to figure out that 300 charge cycles would be about a year. In this respect, I usually toss my batteries when they reach the 10 month/1 year mark.
Huh, I've never read anywhere that says a battery can get to 3000 charge cycles (that'd be like.. 10 years, at the rate that I use my batteries). Maybe this would be with the ultimate most paramount care, but even then, I've seen most websites recommend that batteries are absolutely donions and won't hold their nominal voltage very well at around 500 charge cycles.
I'd say 500 is the highest even the most careful battery user should push their charge cycles to. There are just so many variables involved.
Kinda hard to say.
A Lot depends on How Far Down a Battery is Discharged. And the Way it was Discharged/Charged. And of course, the Quality of the Battery a person is Using.
A Generic eGo with a Built in Battery may only last a 6 or 7 Weeks of Constant use. Whereas a High Amp 18650 may last a Year.
Were you Wondering about a Specific Battery? Or Batteries in General?
"Most Li-ions charge to 4.20V/cell and every reduction in peak charge voltage of 0.10V/cell is said to double cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.00V/cell should deliver 1,200–2,000 and 3.90V/cell 2,400–4,000 cycles."
How to Prolong Lithium-based Batteries - Battery University
These types of batteries will most likely go bad due to time, rather than full discharge/charge cycles. I have AW IMRs almost 2 years old, which don't quite hold a full charge- they charge to 3.9v. and 4.0v. I'll probably just recycle them at 2 years. I am not hard on them the way I vape, though...
You are very pessimistic. 300 charges - it's what very careful manufacturers state. In reality it is closer to 500-1000 charges (to capacity of 80% of initial). Number of cycles till capacity drops to 70%, according to a recent study, was 1000-5000 cycles depending on luck and manufacturer - Lithium-ion battery - Wikipedia, the free encyclopedia
We can prolong battery life by
1. Charging it to 4.1 instead to 4.2V (nearly doubles life)
2. Discharging it to 50% (again, nearly double life)
How to Prolong Lithium-based Batteries - Battery University
So, my estimate of 3000 cycles is rather conservative one, if a battery was not made in China (worst batteries in terms of longevity). But my batteries will not serve for so long. They are not so expensive that I will spend much effort trying to extend their useful life.
Yes. But how many mah for each of these cycles compared to full charge? It is better to talk not to charging cycles, but about recalculated cycles, based on full capacity of battery. Charging to 3.9V reduce capacity by 40%. Then 4000 cycles in terms of delivered electricity is equal to 2400 cycles of full charging. And we never use battery up to full discharge, we leave (I think) about 30% capacity not used. So, when charging to 3.9 V we will use just 30% of capacity (instead of usual 70%)... Swapping batteries all the time...
since we use them in "harsh" conditions... expect 200-300 cycles... if you have 2 sets of batteries, that equates to about 1.5 yrs lifetime for each set
There are too many factors to list which may affect the life span of a cell. Your wisdom/judgment/6th techno-sense should enable you to guage when a cell is past it's best. Failing that, just recycle and replace after a year. Batteries are cheap, burns are painful.
Is there evidence that a battery that's beyond its prime, i.e. has a lot of cycles on it, but still holds a decent charge and hasn't suffered any mechanical damage is more likely to fail in a catastrophic manner than a newish battery?
Good question. I would like to hear some meaningful answer. But from what I see on related web sites suggest there are no evidence it is a threat.
Or generic egos like I have and paid under $6 for have lasted me about 5 months so far and none dead yet or run down quick.
Just bought 4 more of them for $3.50 each VV evod style 650 MA.
Just a question: are you (avarage vaper like me) is really interested in prolonging a life of you $5 ($8?) battery so much you are ready to follow all these nice and very true advises and take a hurdle of living in a nightmare of constant monitoring of your battery status whether in your mod or in charger?
Saving $4 in two years is nice, living a trouble-free life is priceless.
Saving $4 in two years is nice, living a trouble-free life is priceless.
Since its capacity will drop and its internal resistance will increase as the battery ages that can create problems if running the battery near its limit. The battery will get hotter and hotter as it gets older and this could, if unchecked, bring its temperature high enough to cause it to vent. Going further than that usually requires a lot more abuse.
Its lower capacity, as it ages, can cause it to drop to lower and lower voltages a lot faster if not noticed. But, a mech user would feel the difference and a regulated mod user would just see the board's low voltage cutoff kick in earlier than they thought. I don't think that the damage that could occur to the battery, if the voltage dropped very low, would happen. But, if it did, that damage can lower the thermal runaway threshold temperature.
So while theoretically it is possible that a well used, but not abused, battery could potentially vent or go into thermal runaway easier than a new one, it's not likely in my opinion. The battery would need to be run past its CDR limit all the time and/or run on a mech to under 2.0V and left there a while before recharging every time.
I take reasonable care but with 25R's being $5 each, this average vaper just buys new batteries.
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