My 750 sits on the side of my flight bag - need to charge it very occasionally.
You can save / input COM and NAV pre-sets by PC using the provided cable, which can save a lot of time. If you include the Lat/Long of way points you can use the GPS to head to them.
A new version should have the latest software already. I got mine a few years ago so needed to update to be able to put pre-sets into groups (so if you use it as a scanner, you can tell it to scan a group so it doesn't keep stopping on ATISs...).
Enjoy your new toy (sorry - safety tool)!