A question about alternative power supply for hp41 series

[TASP]

Probably just my native paranoia, but having an actual conducting piece of wire from any of my precious HP41s to an electrical outlet (regardless of the intervening electronics) in my rural backwater here, with lightning storms, neighbors with great big 3 phase farm irrigators, neighbors with AC powered fence chargers connected to miles of fences, and a 450 foot communication tower 1/2 way between me and the power company sub-station just isn't going to happen.

I'll plug in the printers and the video interface, and other HP accessories as there is not a real alternative, but except for HP battery chargers, I just try real hard not to leave items from my collection plugged in if I'm not actually using them.

And yes, the house has an electric panel installed surge suppressor, but I'm out in the boonies here, and I'm not inclined to trust the power company with the crown jewels.