Is my sterling silver ring real or fake?

I have the Sears app in my iphone and I bought a Sterling silver White Lab created Opal ring and it was on clearance from $149 to $14.99 but got it for $12.99. But. IT DOESN'T HAVE the (925) stamped on it anywhere! You will probably say well, "what can you expect for that price" but I don't care because it's Sears and in the description it clearly says it's a sterling silver ring so that's what it should be.

Electromagnets and wireless charging. How to make the charging pad larger?

I have purchased a QI wireless charging kit for my iPhone 6s. I have searches everywhere for a larger charging pad, but can't find one anywhere! So, I thought I'd make my own and integrate it into a project I'm making. I have taken the pad apart and have discovered a copper coil. My electronics knowledge is very limited.

I would like to know how to make the pad much larger (around 30cmx20cm).

Ways to keep your phone charged longer?

I have the iphone 7 plus and i got it about a month ago and it dies pretty fast so i was wondering of some stuff i can do to keep it charged other then low power mode and airplane mode. Or some stuff i can delete in settings that's draining my battery. Any thing will help!

Why do my iPhone chargers always break and how can I avoid it?

I've went through probably at least eight chargers in the last few years and they always break. Those were all used to charge my iPhone 5c, now I have an iPhone 7 and my charger is breaking again. It only works if I angle the charger which probably will end up damaging my phone. I'm usually very gentle with my chargers and they all come either with my iPhone or from like Best Buy. I don't know how to stop them from always breaking. Any ideas?

Added (1). Why do my iPhone chargers always break and how can I avoid it?
(The charger I'm currently using that is breaking came with my iPhone 7 so it's definitely a legitimate Apple product)

Downloading Youtube audio to iPhone 5c?

I have an iPhone 5c and have tried to download audio from Youtube to listen to music, but it never works. I'm always brought to a new tab where I can play a small piece of the audio, but it isn't downloaded. I've tried downloading it to a computer then exporting by connecting my phone to the computer, but that never seems to work neither. Anything would be helpful, thank you!