Is the ipad very useful or very useless?

Is the ipad very useful or very useless?

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Why is my ipad losing battery while charging?

Basically, when i plug in my ipad to the charger, it takes forever for it to charge fully, and when i use the ipad the percentage decreases slowly while charging! I've had my ipad air now 1 1/2 years. This started happening recently, is the battery for the ipad becoming bad?
Before anyone asks, yes i use the charger that came with it, the cubed one. And i've even tried my sisters ipad charger and its still the same so its not the chargers. So any advice on what i should do and will i be able to chance the battery for the ipad?

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What is this hardware called?

I've seen many times in movies and animes people drawing with a stylus I think on the surface of a hardware that looks like an ipad, and anything they draw appears on their computer screen… I've been searching all noon and I can't find it anywhere… All I found was tablets made especially for drawing but they didn't use computers… Anyone know what this hardware is called?
P.S. An example of this hardware is in the anime Sakurasou no pet na kanojo (the pet girl of Sakurasou) where mashiro uses it to draw her manga

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Is it still worth buying an iPad mini? - 1

I want to buy a cheap tablet and I really need it to be Apple because I want it linked to my iCloud account. I found that I can buy the first iPad mini for $200 online. I really like the size of the iPad mini. All I would need to use it for is photos, YouTube, Netflix books a few small games and iMessage. Is it worth it?

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A new teacher just punched me?

A new teacher just punched me?
Added (1). a subtitude teacher showed up. I forgot my book so i took a picture of the pages of the book with my ipad. Suddenly he accused me of secretly playing games and just punched me in the chest! I told him that he cant do that but then he kept punching me saying you dropout!( ironically i always get an A). The principal didn't care when i complained. Should i tell my parents and make him loose his job?(my dad is a prosecuter) or sue him of assault or just beat him up at his house with my pals?

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Is it ok to buy a refurbished ipad?

Is it ok to buy a refurbished ipad?

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If I have just wifi and no PC, can I activate my iPad and use iCloud to back it up?

If I have just wifi and no PC, can I activate my iPad and use iCloud to back it up?

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