Are knock-off generic brand iphone chargers safe?

I'm looking to get a 6ft or longer charger for my iPhone 4S. I tried apple's website and they only had longer chargers for iPhone 5. I found a bunch on amazon, eBay, and other generic websites for much less than apple chargers, but I read online that these knock offs aren't safe and can harm my phone and possibly even harm me. Does anyone with more knowledge on chargers/ any electronics background know if this is true and a big problem or not? I don't wanna ruin my phones battery life but I need a longer charger for my dorm. And if the rumors are true, does anyone know where I can find a safe reputable brand iphone4s 6ft-10ft charger?
Thanks <3

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How to change where my App Store charges go to?

My iPhone payments are under my parent's account. If I wanna buy an app, does it charge automatically to their account or will it ask for the information? Is there any way to change the one app payment to my own debit card?

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Use my early upgrade or wait for the iPhone 6?

I got my first iPhone 5 in 2012 (Sept.22) in 2013 I switched to Sprint from Verizon and my Mom got me another iPhone 5 even though the iPhone 5s was going to be announced in 2 weeks. By the time the 5s went on sale it was too late to return the phone. Fast forward to 2014 (July) and I still have my iPhone 5 but now my carrier (Sprint) is offering me an iPhone 5s upgrade for $150 and they'll pay up to $650 in service credits for the monthly payments. So should I take the offer? I want either the iPhone 6 (bigger screen is a MUST) or the Note 4. I might just buy the 6 when it comes out and swap the phones around on my account. (My sister wants to upgrade from her 4s)

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How to reset an iPhone 4s that won't turn on due to a hardware issue?

I tried the hard reset thing where you hold the home button and the power button at the same time and it doesn't work. I think the LCD screen is bad.

My iPhone 4s gets warm when charging, and vibrates every 5 seconds or so when charging but it will not turn on. I just want to remove my icloud account, reset my settings to factory settings, and sell it. But when i plug it into the computer and open iturnes, it says "iTunes could not connect to my iPhone because this computer has not been trusted by the iPhone."

Please tell me there is a way around this without bringing the phone into apple.

Thanks in advance!

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My iMessage won't work on iPhone 4?

It was working fine, then it just randomly stopped working. I can't receive or send iMessages. My iMessage is activated and all my settings are right but it won't work.

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My IPhone storage going down even thou I haven't downloaded anything?

I've got a 16Gb iPhone and I'm new to apple, I checked the storage last night and it was 10.7 and today it's now 10.0 and I haven't downloaded a single thing! I haven't sent any texts and the safari data is like 20kg
I plugged it into iTunes and the "Other" section is like 2gb which confused me as I literally have a few songs and maybe 5 apps and that's it, I've restored my phone and nothing has changed gb still going down. Please help thanks

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Why does my iPhone 5s keep doing this? - 1

For a few weeks my phone has jut been randomly deleting all my photos then a while later bringing them all back like 10 at a time. It's doing it again but the problem is when it gets to about 2,000 photos it just deletes them again and starts bringing them back, then deleting them before it gets to the end (I have 4,000 photos total) it's sorta hard to explain but why does it keep doing this?

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How to check if I have the iPhone 5?

How do I check if I have the iPhone 5?

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When will the new iPhone 6 Phablet come out in stores?

Rumours say that the new iPhone 6 phablet will be a phone/tablet. How is this possible?
The new mobile os: IOS 8 is definitely going to come out this fall.

Good luck to you all on this apple hunt!

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My iPhone 5c randomly said 'searching…' And I can't receive any calls or texts or send them?

But the network is fine with my family's phones.

I've tried airplane mode, resetting my phone 3 times and taken out my sim. Please I'm desperate to get this fixed!

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