dhanson865 wrote: dm33 wrote:
Nissan reps and executives have said on more than one occasion that the 2013 rev was a packaging change more than a chemistry change and that the 2013 packs didn't change chemistry significantly.
Enormous epirical evidence clearly shows that chemistry was improved around April 2013. Batteries after that time degrade MUCH slower than those before.
We had a early 2013 that was totaled and replaced with a later 2013. It was day and night difference. The early 2013 degraded more in 6 months and 6,000 miles than the second car did in almost 3 years and 36,000 miles.
No, empirical evidence shows that degradation was reduced after build dates of 04/13. Chemistry is not the only thing that could be changed. Nissan stated that chemistry did not change significantly so it's reasonable to assume it's another factor or factors.
Again this is off topic in this thread and should be taken to another thread if you wish to continue discussing it.
IF that is true, and there really was no "significant" chemistry change, only "another factor or factors," it would seem logical that the 2011-2012 and early 2013 batteries could benefit with lesser degradation if one or more of these unknown and unmentioned by Nissan factors could be applied to these early batteries. And isn't Nissan thus penalizing early adopters by not telling them how they could save their batteries? Or is Nissan being a bit less than truthful (remember the "around 70%" in the Klee case) and really did change the chemistry and for whatever reason doesn't want people to know how poor the initial batteries really were?
It seems to be well established that heat, in combination with percentage of charge, and to a lesser extent time are the factors that doomed the initial batteries. Obviously the newer batteries can't change the time factor, so how has Nissan mitigated the heat + charge % without changing the chemistry?
As a chemistry major in college (long ago now), I am interested in this juxtaposition and would hope it could be discussed here.
As a seven capacity bar loser, with five remaining, I am definitely hoping the new batteries that Nissan just installed under warranty for me are more than just a repackaged mix of the defective properties of the original batteries.