I have a Heinrichs Weikamp OSTC computer with wireless charging. I only ever need to charge it before the start of a trip and it will last easily a week of four or five dives a day. I would assume the Peregrine charge will last that long too. No need to charge except maybe once on whole trip.
That's nice for you, but you missed the point
I've got a rechargeable Eon, and a Perdix which can use rechargeable batteries (charged outside computer) MY preference is none wirless charging because of the points I raised above. Others my differ, which is fine.
The point is, there's no one method that suits 100% of the users