They fixed the door spring, made the door more robust by improving the plastic and moisture resistance on the contacts, and improved the charger software. They then call it 2nd gen ZPower and got Widex to label this as 2nd gen ZPower. This is back around April 2019.
I bought my ZPower system around this time, not for the Widex hearing aids but for the Oticon OPN hearing aids. Mine has the latest firmware update that’s supposed to have the improved charger software, and my ZPower door never exhibited any issue with opening and closing or moisture related issues. So I believe I have the “2nd gen” Zpower system. I never have any charging related issue at all. My system always charge to completion every morning.
The real remaining issue that has not been fixed at all in my opinion is the Zpower batteries themselves. Almost everyone on this forum who has or had used the ZPower batteries will tell you that the batteries started out lasting for a whole day, then only a few months into it, they began to not last a whole day anymore, but gradually shorter and shorter to a point where it’s unusable because it’s not lasting them all day.
Many of them will tell you that they had returned the old system and they were replaced with newer system with the supposed improvements hailed as the “2nd gen”. Things seem to have improved but then eventually the batteries still didn’t last all day a few months later. So far I’ve never heard of anyone on this forum claiming that they’ve been able to get the ZPower batteries to last them one full year as advertised.
You can just go on Amazon and search for Zpower and read comments on there. A very clear pattern will emerge when you see an overwhelming amount of comments complaining that the batteries don’t last as advertised. Those who gave them 4 or 5 stars are most likely those who hadn’t experienced with the premature failure of the batteries yet.
Here’s another way I look at it: I have the latest ZPower charging system firmware, no issue whatsoever with my battery doors, and originally got a full day charge out of my ZPower batteries. That proves that everything I have was working fine in my system. So when the batteries don’t last the whole day anymore a few months later, everything (the door, the door electronics, the charger software) hasn’t changed, EXCEPT for the batteries’ performance which has worsened. Therefore the problem has to lie with the batteries and nothing else.
Did you also notice that Widex/Zpower crowed about many different improvement in the “2nd gen” ZPower system EXCEPT that they didn’t mention that they did anything to improve the batteries themselves?