Get a good battery charger/maintainer. It will make the battery last a lot longer and keep it at full charge for whenever you want to go. With the good ones you just leave the battery hooked up all the time in the garage.

The other hugely useful aspect of the good chargers/maintainers is that when you hook up a battery after a fishing session it will tell you what the charge is at. This will allow you to actually know how much use you can get out of the battery before it dies on the water. After going out and trolling for 4 hours it is nice to see how much juice you had left for next time out in case you want to fish 6 hours.

The last few years I am really starting to appreciate a good electric motor setup and a small light boat you can drop into any lake, especially without a boat launch, and than slow cruising, watching the wildlife, and hopefully catching some really nice trout.