K.C. wrote in post #14603367
So to sum it up, don't be an idiot and try to charge your very expensive LI battery with the wrong charger and everything will be fine.
Good advice.
Now and then, real good companies (maybe even in direct association with the battery vendors) do push the envelope a bit too high. Then we see these very expensive recalls of batteries. It has happened to just about every big supplier of electronics - companies with the best design departments.
So in the end, the "correct" charger with the expensive original battery could still be a combination that results in big issues - something we buyers often will not know about until a couple of years later.
Today, at least some manufacturers have at least learned that they should slightly downplay the capacity of the batteries or the charging time of the batteries. So maybe specify charging time to 90% of the capacity. Then go very slow the last part. Or specify that the battery is full (indicate 100%) when the battery reaches 90%. And then show "bonus" capacity when the charger then continues at a lowered speed. A Sony video camera I have does that - the charge time claimed is up to 100%. Continue to charge for 1-2 hours more, it reaches somewhere 108-110%.
The big problem is that we customers wants to see nice figures. We want to see a huge capacity (Wh or Ah) and we want to see fast charge times. And the batteries have production variation. So what works with the best batteries may be over the limit for the 1-5% least good batteries. And this variation may not be visible directly at factory but may show up first with one or more years of use.
The good thing is that the battery manufacturers learns as time progresses so they can supply better and better information to the electronics designers. So hopefully, we should get fewer and fewer products that do ship with batteries/chargers that may be running too close to the safe envelope.