@ChouChouYou are welcome! I noticed the differences too - and I think my others were mAh instead of mWh and I'm with you on not knowing what the difference means or why the change. Hopefully they will address in the presentation. I also noticed there is no car charger with this TSV.
I have received a couple of glitchy Halos over the past couple of years and was very frustrated last year when they could not replace one that I had sent back in the color I needed for a particular gift.
Having said that, when they work they are one of the best things I have ever purchased from QVC (and we have several between our kids and us). I have been able to help someone jump their Ford Explorer and also a big Econoline van. We live in Florida and Halos are amazing during hurricanes for everything from charging phones/tablets to plugging in a USB fan. I know you are a fan of the Halo and your grands will probably use them a lot with their devices and may even ask for another next year that they can keep in the car lol!