You know, I've been thinking of this 'I've got X defective Ascents in a row' next to the 'I've had Y with no problems'. posts. In a random population of units and owners this is statistically impossible. I'm not accusing anyone of anything, and I'm sure not sucking around for a lot of 'I'm telling the truth about what I saw' posts. I'm just saying there has to be at least one other significant factor here.
Something is not random, statistically this is not possible, we can have zero confidence in the data. Zero. At least from a scientific standpoint. The QA (Quality Assurance, as opposed to QC) guys know what I'm talking about I'm sure. If the majority of your products have no issues and the few issues you do have are confined to a small number of customers with multiple failures "something else is up". Again, a general comment, not specific to anyone here.
Statistical Quality Control is all about statistics. And these don't add up.
So, still thinking out loud, what can be going on? I'm wondering if it might have to do with battery usage? Specifically over discharge. No, I don't want angry, defensive, 'I never did that and.....' posts, I'm just asking what happens to the unit? I never tried it on Nigel's loaner, but I wonder how it handles 'lock out'.
Here's the thinking. We have two cells in series like the Solo and VB. And Persei and TV stuff in HV modes. The unit can only sense the total voltage. It can only assume the two cells are equal in charge, and act on the total. Against this is, most likely, a protection PCB that will save the individual cells from instant death by discharge below about 2.5 Volts (easily possible if the other one is pulling stong still). How such things recover is not always seamless. Often there's no way to ensure the cells will ever again be balanced. The weak one gets weaker all the time while the stronger one goes along just fine? With TV and Persei this is not an issue since we can remove the cells and treat them as individuals with every charging. Not so in the pack.
When I rebuilt my Solo battery, one cell of the two was just fine, the other had about 1/3 the capacity of it's stronger brother. I wonder if this is a factor here????
Again, please, this is not an accusation of anyone or any report here. Just an 'off the cuff' thought or two and some conjecture.
Anyone out there in DV land have a thought here? I can't get past the idea that failures have to be fairly uncommon (or DV would be broke long ago replacing every unit over and over). Why do they seem concentrated????
It's Sunday, a good day for such thoughts I think. Thanks for listening.
OF