Audrey,
A second battery is a good thought. Wow, I jobs lasting 5 to 6 hours, here in Florida I have gotten used to 3 hour dances.

I do not own a Pad, I use my Laptop. It is an older model which gives me only one hour of use so I always carry the electric cord.

I also thought what if my laptop fails – my backup system, the books are always in the car. Hmmmm.
I come from a family that did not trust new gadgets, so when my Dad first used his calculator I found him adding the figures on a paper bag just to make sure the gadget.

John C.