At $20, it's tough to beat this Anker power bank for portability and performance

Some tech devices are so cheap that it's hard to imagine them being any more affordable. But that is exactly what has happened to the Anker PowerCore 10K, which is on sale at Amazon for $19.99 (was $25.99).

This is quite frankly a ludicrous price for a 10,000mAh capacity power bank, and even though we haven't reviewed this particular model, Anker is always very well represented in our guide to the very best power banks.

Having owned several power banks, I have found that this capacity hits the sweet spot between portability and performance. At under $20, what is there to lose?

Today's best cheap power bank deal

Anker PowerCore 10K: was $25.99 now $19.99 at Amazon

This might not be the biggest discount in real money terms, but that doesn't negate the fact that this deal price is pretty amazing. The power bank is compact and well-built, boasting a 10,000mAh capacity, which makes it perfect for keeping your smartphone fully charged while on the move or travelling.

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We've not reviewed the PowerCore 10K, but on paper, it's one of the slimmest and lightest 10,000mAh portable chargers on the market. If you get into a sticky situation, then it'll boost the charge of a laptop, but really, it's designed primarily for keeping your phone going — whether that's when you're out and about, travelling, or on a camping trip.

In terms of connectivity, the PowerCore 10K includes one micro USB port exclusively for charging the power bank itself, a USB-C port that supports both input and output, and one USB-A port with only output. As a result, you can charge two devices at once if you like.

We've reviewed a ton of power banks, and if this one isn't for you, then we'd highly recommend the Anker MagGo Power Bank (10K Slim), Anker 737 Power Bank (PowerCore 24K), or Anker 20,000mAh 87W Power Bank. Our reviews go in-depth, covering all the pros and cons.