
How long a power bank will last depends on the type and quality of the battery cell within. Currently power bank manufacturers tend to use lithium battery cells that will guarantee satisfying battery life.
How quickly a power bank will charge your devices has something to do with the rated battery capacity and the USB output. Generally, 10000mAh capacity is able to fulfill your requirements for a high-speed quick charge. 2.4A per USB port is fast enough to bring your dead battery back to alive. A power bank with both quick input and output will greatly save your time charging the power bank itself and your USB-powered devices.
And the solidly built hard case directly will impress you about its durability. Sturdy outer shells are usually designed to be lightweight and portable. It's not because consumers are becoming pickier, but obviously they can't stand any flaws on the appearance design, the finish of the case, the layout of input & output USB ports, buttons and small LED indicators.

Price is also a priority unless you are rolling in money, turning a blind eye to what's worth or not. For a high capacity power bank, such as a 10000mAh power bank, they will usually charge you possibly 10 to 15 USD, 20 USD at most.
View the following 5 High Capacity 10000mAh Power Banks which could be your best choice if you are looking for a useful high capacity power bank with a reasonable price.
1. Poweradd Power Bank 2nd Gen Pilot 2GS 10,000mAh Power Bank ( Amazon's Choice).
See what will turn you on about this power bank:
10000mAh high capacity, Dual USB (1.0A + 2.4A) for quick charge, PowerSI Technology for scientific output adjustment for quickest charge, compact size for great portability, yummy price $15.99 and a 2-year warranty. Totally worth the investment!

2. Aibocn 10,000mAh Power Bank ( Amazon's Choice).
This Aibocn power bank is also marked as Amazon's Choice. And it absolutely deserves this honor for its exquisite and portable design, intelligent protection against over charge, discharge, issues on voltage or current. It has a perfect size to hold in hand and functions as a flashlight if necessary with the backup flashlight design. Very impressive, bargain price $10.49 for a high capacity power bank with 10000mAh and dual USB.

3. AmazonBasics Portable Power Bank
You would love this one. It's thin and light, with lithium-ion polymer battery built in. The physical size is just slightly thicker than a frequently-seen cellphone. When a 10000mAh high capacity power bank is so pocket-friendly, you can easily put in your jean pocket on the go. Made of plastic though, the case feels sturdy and durable. It sells at $23.99, somewhat higher than expected.

4. EasyAcc 10000mAh Power Bank
Some customers are quite impressed with this power bank. It looks fantastic with fine workmanship on the case and features a small size like a cellphone. With the specs and technical info as advertised, the 10000mAh is able to charge both a cellphone and a Bluetooth headset about 6 times before it needs to be recharged again. $17.99 is fair enough for a power companion on the go.

5. Viivant AirX 10,000mAh Power Bank.
This model fits easily into your pocket because of the slim size and it's designed to be ergonomic on the case surface. It's wider in width to be more palm-friendly. Thanks to the good layout of buttons and ports, you will enjoy this anti-drain power button. With max output 2.4A for the USB and high capacity for plenty of power juice whitin, this power bank sells at $19.99.

Check more choices of 10,000mAh high capacity power banks.