Keep your devices charged all summer long by having a power bank in tow. The following external battery packs are powerful enough to provide a couple full charges to smartphones and at least one full charge to tablets. Use the dual USB ports to charge multiple devices at the same time.

Both power banks are rated 4.5 stars from thousands of Amazon buyers.


Looking for even more portability? KickBot via Amazon offers the PowerBot 2600mAh ultra-compact power bank with built-in LED flashlight for $10 shipped.