What kind of battery is durable in a mobile power bank

Watching your phone or tablet steadily run out of power when you're nowhere near an outlet is stressful. But there's an easy solution: a portable battery or power bank. These are available in many sizes and capacities, and can include lots of handy features like fast charging and multiple ports.

To sum it up, here's a quick guide based on your needs: For daily use – A 5,000–10,000 mAh power bank is enough to keep your phone topped up. For travel or lots of charging – A 10,000–20,000 mAh power bank with multiple ports will let you charge multiple devices more than once.

All of the power banks on this list are relatively small and portable. The majority of users pick 10,000 mAh to 15,000 mAh power banks, a good choice for recharging a personal smartphone. Compact 10,000 mAh options like the Skullcandy Fat Stash 2 and the Nitecore NB 10000 offer a nice balance between utility and portability.

If you need to charge larger devices, go with a power bank with greater capacity, like the BioLite Charge Max 100. The Skullcandy Fat Stash 2 ($40) almost beat out the Goal Zero Flip 24 for the Most Portable Power Bank until we realized that this little box packs quite a punch.

For this range of power banks, you can pay anywhere from $20 to $160. Power banks with a capacity rating of 20,000 mAh or larger are the most versatile of the group. They offer the greatest array of inputs and outputs as they are designed to charge multiple devices at once or charge a single device multiple times.

The capacity of a power bank is measured in milliampere-hours (mAh). In simple terms, a higher mAh means the power bank can hold more charge. Here's a basic breakdown: 5,000 mAh – Charges most smartphones about once. 10,000 mAh – Enough to charge a smartphone twice or a small tablet once.