These 7 Amazon Black Friday deals are so good, I'd buy them twice (and they're under $25)

I'd buy these gadgets any time of year, but they just got cheaper during Amazon's Black Friday sale.

Black Friday is just a week away, but early sales across retailers mean you can snag affordable yet functional buys right now. I'm talking about no-fuss, under-$25 gadgets that make your life easier and won't leave you with buyer's remorse. And with Amazon's sale in motion, Prime shipping can get you these deals even faster. 

Also: The best Black Friday deals you can shop now 

I test nifty gear and accessories 24/7/365, and as ZDNET's deals and shopping editor, I know my way around a sale page. I'm a voracious deal hunter, but some of my best advice for avoiding impulse buys is to stay within a small price range. Gadgets and gizmos are perfect for this. They satisfy the shopping ...