Using this battery holder is easy. First, insert 3 AA batteries into the holder. You can choose NiMH / NiCd cells for a 3.6V rechargeable option or Alkaline cells for a 4.5V power supply. Then, connect the MicroUSB cable to your Arduino to start powering it. When it comes to storage, keep it at a room temperature of 25°C (77°F). Don't let the temperature go above 80°C (176°F) during operation. To maintain it, just keep it clean and dry. Avoid dropping or applying excessive force to the plastic body. That's all you need to know to make the most of this battery holder.