The graphs show reduced life by factor of 10 or more? Are you sure you know how to read a graph?
Yes, and yes.
The graphs show reduced life by factor of 10 or more? Are you sure you know how to read a graph?
Yes, and yes.
Perhaps you don't know what factor of 10 means? You really ought to google terms before using them in a sentence.
I have no idea what lies at the source of your confusion. But if I had to make a guess, it might be related to the fact that cells are considered end-of-life when they reach 80% of nominal capacity. Keep that in mind when you are extrapolating data from the graphs.
Good idea, we already woke the enforcers a while back over something small, never thought they would visit this forum for such small stuff.I have pretty strong idea what lies at the source of your confusion, but I am going to keep it to myself out of politeness. Who exactly (besides yourself) considers cells end-of-life when they reach 80% nominal capacity?
Who exactly (besides yourself) considers cells end-of-life when they reach 80% nominal capacity?
I have pretty strong idea what lies at the source of your confusion, but I am going to keep it to myself out of politeness.
That is the industry standard when doing cycle life tests. Some may go a bit lower, to 75% or 70%. But it doesn't matter much where you draw the line, because the degradation caused by high-rate CC/CV charging is a nonlinear process, so one will see the same qualitative effects at some point.
What politeness? You puerile jabs above ("Sure you know how to read a graph" ... "maybe you don't know what a factor of 10 means") are far from polite. You won't have much luck eliciting expositions form others if you continue to behave like that.
Thanks for the report. I've not used this charger yet, just have it for charging some 26650 cells a little faster than some of my other chargers I trust and easier than the hobby charger. I have not had time to make room for it with several other chargers in use or test, but I'll be recharging more 26650 cells now so I plan to get it hooked up soon.I am using this charger exclusively now.
About 2 months ago the spring broke on one of the sliders.
Rather than go to the hassle of returning the thing for a new one I decided to fix it.
Removed rubber feet,unscrewed the bottom and revealed the problem.
The little plastic post the spring fixes to broke.(this plastic post is way underdesigned flimsy very poor)
I was able to drill a hole in the PC board just behind the broken post and attached the spring in the hole.
Better than new.
Just my 2 cents
Therefore, in the graph, we are looking to compare cases marked "C charge" with "C/2 charge", and "C/5 charge" with "C/10 charge". We are not looking to compare "C charge" with "C/10 charge", because that represents ten times the charge rate, not doubling.
There are many other studies which illustrate this fundamental asymmetry, some of which you don't even have to extrapolate to infer the results.
In extreme cases doubling the charge rate can reduce life by a factor of 10 or more
I think the cell charging discussion is now way OT for this thread. Let's get it back to this charger.
Start | 20% |
55min | 42% |
115min | 70% |
164min | 96% |
175min | 99% |
204min | 100% (4.20V) |
anyone have a link to a chart where i can determine what current to charge at least the most popular batteries? if someone wants to just reply to a few, here's the ones i use the most. btw, i can never remember the li-on numbering system. apologies.
Between the xtar vc2 plus and xtar sv2 what would you choose?
I want it for charging 18650 and some eneloop pro 5th gen,nothing more.
Thank you.