Does the Museum have a power wheelchair to rent while visiting?

No they do not have powered wheelchairs just plain wheelchairs and you don't have to rent then

This information is from their website. They don't mention if they are power wheelchairs or not, so you should call to check on that: Wheelchairs and Strollers The museum offers a limited supply of complimentary wheelchairs and strollers, available on a first-come, first-served basis. All public entrances (and most exhibit areas) are accessible by wheelchair, scooter, stroller, and walker. The museum also has two ramps available for guests, including one at the rear of the Skyliner Diner and one that leads to the upper portion of Reading Adventureland.

I don't know if they do, however that is a good idea to bring up to the management there. I feel that would be a good service to have.

I do not know....however I did know they are wheel chair accessible and do have an elevator to gain access to the upper level of the museum