The device has a standard memory slot (such as an SD or micro SD card slot) that enables you to extend the built-in internal storage with affordable memory modules, or easily retrieve data, such as photographs, from the memory card.
The battery can be recharged and used over again.
The internal storage refers to the built-in storage space available in a device for system data, apps, and user-generated data. With a large amount of internal storage, you can save more files and apps on your device.
You can record lectures, music, notes, etc., directly onto an SD card, which provides more storage flexibility.
Battery power, or battery capacity, represents the amount of electrical energy that a battery can store. More battery power can be an indication of longer battery life.
Some manufacturers include a memory card in the box. An SD card with a higher storage capacity allows you to extend the storage space on your device with ease, providing you with more space for your data.
The battery is removable and can be replaced by the user if broken.