Convenience comes at a price, though it just became a little bit more affordable. Anker's PowerCore 13000mAh Compact Power Bank can help make sure you always have a way to power up your smartphone, tablet, and other USB-powered devices while you're traveling or away from a permanent power source. Now, thanks to a sale at Amazon, this portable power bank is on sale for as low as $21.24. That's one of its best prices in years, though only the Black model is priced this low currently. You can pick up the Blue, Red, and White versions for $27.99 each, which is still a nice $10 discount off the full price of $38.

Pocket Power

Anker PowerCore 13000 Portable Charger

Bring enough power to recharge your smartphone several times using Anker's compact PowerCore 13000 power bank. It features two USB ports and even comes with an 18-month warranty. Red, Blue, and White models are on sale for a few dollars more.

$21.24 $37.99 $17 off

The deal given is no longer valid and we do not have a better one. However, we have found some similar deals

This 13000mAh portable power bank is equipped with two high-speed USB ports to charge your devices with, along with a micro-USB port designed to charge the battery itself. That allows you to power up two devices at the same time with PowerIQ and VoltageBoost technologies offering an optimized charge per device. At up to 3A per port, you'll generally receive a fast charge no matter what device is currently plugged in. The power bank is pretty compact and slim too, thinner than some wallets even, making it possible to just slip it into your pocket.

VPN Deals: Lifetime license for $16, monthly plans at $1 & more

No AC adapter is included with this power bank's purchase, so you might want to add one to your order if you're in need. Shipping at Amazon is free on orders totaling $25 or more, or with an Amazon Prime membership. If you're not a member already, why not consider starting a free 30-day trial? You'd score free two-day shipping, exclusive members-only discounts, access to the Prime Video streaming service, and more.

Not sure if the Powercore 13000 is the right power bank for you? Our guide to the best power banks under $30 has several other worthwhile options right around today's sale price. You could also take a look at this list of the best portable high-capacity power banks if you want one that has enough juice to power up your laptop and other devices.

We may earn a commission for purchases using our links. Learn more.