I appreciate the info. What's weird is that the day after I asked that, the black Extreme battery I'd ordered for my husband melted when charging in my computer's USB port. It got very, very hot, and I'm thinking could have caused a fire. I contacted Apollo customer service, and they're sending a replacement battery. But I got an email today that maybe explained the issue... it warned to NOT USE the charger that came in the free Extreme mini kit to charge any battery EXCEPT the single Extreme battery that came in the kit.
I am happy with the response from customer service, happy to have gotten that email (even if it was after the fact,) and happy to be getting a replacement charger... but I really should have gotten that email MUCH sooner!
Is Apollo stopping shipment on the "standalone" Extreme battery from the mini kit? If not, is Apollo at least sending out an email RIGHT AWAY to anyone who orders them? It is a very, very serious safety issue.