J Martindale,
There is not any bad advice in this thread. Unnecessary is not bad, per say. However, you have received lots of different advice from people a long way from where you are wanting to fly RC.
When we have a person asking about learning to fly, the most common answer is something like, "Go to local clubs (or your local club) and learn who are the members who assist the new people." I highly recommend that approach to you for answers to your battery question. After hearing what they have to say, make your decision.
Of course, you still have what you received here.
Best to you.
Ken Erickson
Your