I am into RC stuff and the higher the battery the more expensive. The more I use my RC stuff and recharge the battery on every flight I notice the battery starts to give me less flying time as they get older. So if you plan on doing this and using your trains a lot plan on buying replacement batteries. I probably own over a 100 lipo batteries as I use them in my flashlights as well. They have come along way with safety on these batteries. I don’t think you need a recharge bag or ammo box to hold these in anymore.