Let me see if I have this right...
1. ZipMobile #1 dies.
2. ZipMobile #2 is ready to be used.
3. Somebody here troubleshoots #1, and says it's the power pack.
4. Somebody made the decision to NOT use ZipMobile #2.
5. Instead of using #2, they take the GOOD power pack from #2.
6. They try to install the good power pack in #1, and it gets fried.
7. Now, both #1 & #2 are down, and we have no spare power packs on island
8. A tech flies with 4 power packs to HNL
9. The tech successfully installs power packs in #1 & #2 without frying either one.
Unless I missed something, my first impression is, the "tech" who removed the power pack in #1 is the same "tech" who moved #2's power pack and is responsible for frying it as well.
Only after the local "tech" managed to bring down both ZipMobiles did DOT admit they MIGHT need a tech who knows something about power packs.
If we had a local tech, or at least someone with the phone number of that mainland tech, maybe the second power pack would have survived.
Additionally, whoever made the decision to replace #1's power pack with #2's power pack used bad judgement. I believe they were trying to find the quickest fix, and should have gone with the solution that had the highest chance of success instead. Unless they knew for a fact what caused the first power pack to fail, whether human error or a problem somewhere in the controls or circuit, moving power pack #2 from a functioning ZipMobile was not smart.
I'm sure I don't have all the facts, but this is what I think caused both ZipMobiles to be down, based on the available information.